15 Unfinished Roman Megaprojects – and more
In AD 67, Emperor Nero announced a plan to cut Greece in half, not politically but literally, with shovels. The target was the Isthmus of Corinth, a narrow strip of land linking mainland Greece to the Peloponnese. Merchant ships could sail hundreds of kilometers around the peninsula, risking storms and shipwreck, or unload and drag their cargo overland.
Nero proposed a third option: remove the land. To launch the work he traveled to Corinth and struck the ground with a golden pickaxe, then handed the digging to thousands of laborers and prisoners. Their tools were picks, baskets and ropes, and for many prisoners the pay was nothing.
The canal made real progress, and for a moment the dream looked achievable. Then Rome’s political problems caught up with the emperor. Rebellions erupted, Nero’s authority collapsed, and in 68 he died. The workers stopped digging, and the trenches were abandoned. The canal was finally completed in 1893, roughly 1,800 years behind schedule.
Another emperor took aim at a lake. Claudius looked at Lake Fucinus, one of Italy’s largest inland lakes, whose fluctuating water levels sometimes flooded nearby farmland. A reasonable person might have improved the drainage. Claudius wanted to drain the lake entirely, through an enormous tunnel dug through a mountain toward the River Liris.
Thousands of laborers, including enslaved workers, spent about eleven years on the project, with oil lamps for light and little ventilation. Claudius staged a spectacular naval battle on the lake to celebrate before the opening. Then the drainage was opened, and the results disappointed. The tunnel’s gradient and capacity fell short of what was needed, and although later work improved the system, the lake stubbornly remained until the nineteenth century.
Rome also had a thirst problem. By AD 38, Caligula had begun two enormous aqueducts, the Aqua Claudia and the Anio Novus, to carry water across valleys on towering arches. The Romans relied on gravity, so a mistake in the gradient could turn a magnificent aqueduct into an expensive decorative ditch. Workers cut tunnels, laid channels and raised the arches with muscle, measuring instruments and optimism.
In 41, Caligula was assassinated by members of his own guard, which was bad news for the schedule. His successor Claudius decided Rome still needed water, and in 52 both aqueducts were inaugurated. These were not abandoned projects so much as interrupted ones. The engineering outlived the emperor, which was fortunate, since replacing an emperor was easier than replacing kilometers of stone arches.
On the western coast of modern Turkey stands the Temple of Apollo at Didyma, a Hellenistic project begun around the fourth century BC that was still unfinished when the Romans got involved. Its designers imagined enormous marble columns, towering walls, grand staircases and a sacred inner courtyard that made ordinary temples look like garden sheds. Some columns rose nearly twenty meters.
Marble was expensive and heavy, craftsmen needed paying, and wealthy patrons had a habit of dying, losing influence or finding other things to spend money on, such as wars or statues of themselves. Some columns were never fully carved, and some surfaces still preserve unfinished details. The ruins stand today as possibly the longest-running renovation in Greek history.
At Sardis, in western Turkey, the Temple of Artemis tells a similar story. Begun in the Hellenistic period, it was designed with gigantic Ionic columns, some roughly eighteen meters tall, and a monumental platform. Quarrying, moving and raising the marble took ropes, wooden machinery and enormous human effort, and a single mistake could turn several tons of stone into rubble.
Under Roman rule the temple was modified further, including changes tied to imperial worship, yet it never reached its intended design. Some columns were left unfinished, others were never raised, and parts of the stonework still show where craftsmen stopped. The Romans inherited an unfinished temple, improved it a little and left it unfinished.
At Aizanoi in Roman Asia Minor, the Temple of Zeus belongs to the more successful category. Built in the second century, when the city was prosperous, it stood on an elevated platform ringed by Ionic columns, above an unusual vaulted chamber. The underground room demanded precisely positioned stone blocks to carry the weight above.
The temple was in use, so this was no abandoned pile of foundations. It was more like moving into a house while builders argued about the kitchen tiles, with some decorative details left incomplete. Much of the structure survives today.
By the late first century, Emperor Domitian had a problem with the Dacians, who lived north of the Danube in territory roughly matching modern Romania and stayed independent of Rome. Invading meant building roads, camps, supply depots, bridges and fortresses through forests, mountains and rivers. Roman soldiers cleared timber, dug ditches and raised palisades, all while facing Decebalus, a capable Dacian king with little interest in becoming Roman.
Fighting in the 80s brought Roman setbacks before important victories, but complete conquest would have demanded enormous resources. In 89, Domitian negotiated peace, leaving Decebalus on his throne while Rome provided financial and technical support under the settlement. Rome had fought a war and then paid the man it had been fighting. The infrastructure never became the base of a permanent province, and Dacia stayed independent until Trajan conquered it years later.
In the muddy lowlands of the Netherlands, around AD 47, the general Corbulo ordered his soldiers to dig a canal linking the Rhine and the Meuse. It was meant to give military vessels a safer inland route that avoided dangerous coastal waters. The soldiers faced marshes, tides and deep mud, with wooden tools, heavy baskets and mosquitoes.
This one actually worked. The canal became part of regional military transportation, though it lost importance as the frontier strategy shifted, and its surviving traces later helped archaeologists reconstruct it. Corbulo had won against geography, and the swamp went on being damp.
At Teos, on the Turkish coast, an old Greek theater was rebuilt and altered over centuries to suit Roman tastes, with larger audiences, improved seating and impressive stonework. Wealthy benefactors paid for the improvements, preferably with their names carved into the stone. The surviving evidence does not show one great renovation that was abandoned, but a complicated building history of different phases. In the end the city declined and the building lost its purpose, and nobody was asking when it would be finished.
In AD 142, Emperor Antoninus Pius pushed Roman control deeper into Scotland, ordering a new frontier about 63 kilometers long between the Firth of Forth and the Firth of Clyde. The Antonine Wall was a massive turf rampart on a stone foundation, with a deep ditch in front and forts and roads behind. Roman soldiers cut turf, hauled stone and dug trenches in cold, wet weather.
For a time it worked. But military pressure, supply difficulties and shifting strategy made the northern line increasingly unattractive, and after roughly two decades Roman forces withdrew south to Hadrian’s Wall, the barrier they already had. Sections of the rampart and ditch remain visible today.
By the late third century Rome had developed an expensive passion for bathing. Diocletian began a gigantic complex around AD 298, covering about thirteen hectares, with enormous vaulted halls, hundreds of columns, underground furnaces, miles of pipes and heated pools. Hot air circulated beneath raised floors and through wall cavities, and someone had to keep the furnaces burning all day.
Diocletian retired in 305, an emperor voluntarily leaving office, and the baths were finished under his successors and dedicated around 306. So the project was not abandoned, but the man who commissioned it missed the opening. For centuries the baths served Rome, and substantial remains survive, some built into later structures.
In North Africa, Trajan founded the city of Timgad around AD 100, in what is now Algeria. It was laid out on a remarkably organized street grid, with straight roads and mathematically planned neighborhoods, and soon acquired temples, baths, markets and a theater for thousands of spectators. Retired soldiers received land in the new colony, and arrived to find half the neighborhood still under construction.
Then people moved in and ruined the symmetry. As the city prospered, new neighborhoods spilled outside the original rectangle, a kind of ancient suburban sprawl. Eventually political upheaval, warfare and economic change led to decline, sand covered the streets, and the remarkably preserved ruins now show Roman urban planning and its limits.
In AD 83 the Roman army reached Scotland and began building a vast legionary fortress at Inchtuthil, meant to house about 5,000 soldiers. It covered roughly 21 hectares, with barracks, workshops, warehouses, headquarters, defensive walls, roads and drainage. The legionaries who had marched hundreds of kilometers arrived to find that their first task was building their own accommodation.
Then Rome changed its plans. Military priorities shifted, and the legion withdrew before the fortress could serve its intended purpose. Before leaving, the Romans buried a huge collection of iron nails. Archaeologists later found more than 800,000 of them, apparently hidden so enemies could not reuse them.
In the early fourth century Trier, in modern Germany, became one of the most important imperial residences in the Western Roman Empire, and construction followed. The most famous surviving structure is the monumental audience hall known as the Basilica of Constantine, a vast brick building designed to make visitors feel small, with an elaborate heating system to counter German winters. Constantine later turned his attention elsewhere and founded Constantinople as his eastern capital.
Historians cannot identify one specific palace that Constantine ordered and then abandoned unfinished. The story is less about a single incomplete palace than about a building program whose ambitions outlived the circumstances that created it. The great hall still stands.
Trier’s Imperial Baths, begun in the late third or early fourth century, were the final entry. The planned complex was enormous, with grand bathing halls, elaborate heating, underground service passages and towering vaulted chambers. As the city’s political importance shifted, the baths were never completed or used as originally intended, and parts of the site were later adapted for other purposes, including military and defensive ones. The surviving ruins, with their massive brick walls and underground passages, reveal the astonishing scale of the original ambition.
After these stories, the Romans can be said to have dreamed big, built bigger and occasionally changed their minds. At least the ruins are impressive.
The Middle Ages had its own unfinished business, in the lives of teenagers. Medieval teenagers were supposed to be obedient, hardworking and respectful, following instructions, attending church and finishing chores. Many found those expectations unreasonable, and behind the respectable surface of village life existed a lively world of secret romances, forbidden games, nighttime gatherings and occasional trouble with the authorities.
They did not enjoy the freedom of modern adolescents. Most began working early, helping with fields, animals, cooking or family businesses, while others became apprentices living under a master who controlled nearly every part of their routine. But no household could supervise its younger members every hour, and village greens became places for gossip, games and arranged meetings. Religious festivals and market days offered convenient excuses.
Romance was especially hard to control. Young men and women exchanged affectionate words, arranged secret meetings and formed attachments their families might not approve of. Since marriage involved property, inheritance and family alliances, choosing the wrong partner could stir up considerable domestic excitement, and a prosperous farmer might object to a daughter’s attachment to a landless laborer.
Gossip, though, was one thing medieval villages produced in unlimited quantity, and reputation mattered enormously, especially for young women. The church complicated matters as well. Under medieval Western canon law, a marriage could be valid when two eligible people freely exchanged present-tense consent, even without an elaborate ceremony, which sometimes led couples to claim they had married privately. Church authorities increasingly discouraged such clandestine unions because they were hard to prove and could cause disputes.
Games offered other entertainment. Young people played dice, wrestled, raced and competed in rough ball games, often with little equipment, and gambling became a recurring concern for authorities. Town governments sometimes restricted dice, and masters preferred apprentices who focused on trades rather than expensive hobbies. In medieval England, authorities sometimes encouraged archery because skilled archers were valuable for military service, which made some recreation more respectable.
Night offered a little freedom. Once the work was done, young people might gather at village greens, crossroads or near taverns to sing, dance and trade stories. Escaping a small house where relatives slept close together took planning. Some songs contained suggestive jokes or insults, letting young people challenge expectations without confronting their elders.
Darkness carried risks. Many towns imposed curfews and used watchmen to reduce fire, theft and violence, and groups of unmarried young men were especially likely to attract concern. Taverns added temptation, offering food, drink, conversation and entertainment. Some apprenticeship agreements specifically banned gambling or frequenting taverns, though writing a rule did not guarantee obedience.
Practical jokes were part of life too. One tradition, known as charivari or rough music, involved groups gathering outside a home to bang pots and shout insults, often to criticize a marriage the community disapproved of. Young unmarried men sometimes played prominent roles. During festivals, disguises, mock performances and playful reversals of authority gave young people a chance to behave in ways everyday life discouraged.
Getting caught could mean more than a lecture. Local courts regularly handled fights, theft, property damage and disturbances, and church courts looked into marriage promises and sexual conduct. Surviving records, though, preserve incidents serious enough to attract attention, not the countless evenings when young people simply went home. Most teenagers were probably working, learning trades and slowly taking on adult duties.
Festivals were the best escape. Christmas, Easter, Pentecost and saints’ days brought communal meals, music and dancing, and a village celebration might bring visitors from neighboring communities. Dancing worried some religious authorities, who feared drunkenness and improper behavior, yet it remained popular across medieval Europe. A teenager exhausted from a week in the fields could find remarkable energy once the dancing began.
Adulthood came gradually. Medieval Europe had no single birthday when childhood ended, and the path depended on status, occupation, gender and local custom. An apprentice might become a journeyman, and ordinary men and women often married later than popular imagination suggests, since a household needed resources. Looking back, medieval teenagers seem remarkably familiar. They wanted friendship, excitement and chances to make decisions without supervision, and a frustrated parent was probably already asking where they had been and why they were home so late.
Medieval boys had many ways to impress girls, and surprisingly few involved a normal conversation. Marriage was shaped by family expectations, economic circumstances and social standing, and wealthy families sometimes treated it as a way to strengthen alliances or protect property. Young people, however, kept developing feelings without consulting their parents’ finances.
Physical strength was one option. Wrestling, running and throwing contests were common at festivals and markets, and in rural communities strength had practical value because agricultural work demanded endurance. Among the nobility, displays of courage became more elaborate, with riding, weapons training and tournaments before noble audiences. Whether a wrestling victory impressed a particular girl, though, was another matter.
Appearance mattered as well. Clothing signaled occupation, family background and wealth, and in the later Middle Ages fashionable young noblemen sometimes wore fitted garments, short doublets, colorful hose and elaborate headwear. Moralists complained about extravagance, and some authorities introduced sumptuary laws to regulate it. In the fourteenth and fifteenth centuries, pointed shoes called poulaines grew fashionable in parts of Europe, some with dramatically elongated toes.
Dancing offered another stage. Weddings, festivals and seasonal celebrations brought young people together, and a boy could approach a girl without the suspicion that a private meeting would arouse. For ordinary villagers dancing was less formal, needing confidence and a sense of rhythm. Music helped too, since a pleasant voice or an entertaining performance could earn admiration.
Words were another tool. In southern France, troubadours composed songs celebrating love, admiration and longing, helping popularize ideals of courtly love, and aristocratic youths met these traditions through poetry and musical performance. Much of ordinary people’s romantic culture went unrecorded, though surviving songs show the importance of music and language in courtship. A compliment could be welcomed, ignored or taken as inappropriate, and public declarations risked embarrassment.
Small gifts, such as flowers, fruit, ribbons or handmade objects, were cheaper. Their value lay more in symbolism than price, and in aristocratic romance ladies sometimes gave tokens to knights who carried them as signs of devotion. An expensive present could also create expectations or attract unwanted attention from relatives, and gossip spread quickly.
For noble boys, tournaments could serve as romantic theater. Knights competed for prestige and prizes before audiences that included noblewomen, and courtly literature turned the contests into romantic spectacle, with knights carrying a lady’s favor. Tournaments were not originally organized to impress women, though, and they involved military training, aristocratic prestige and money. Falls and collisions also made them dangerous. Most village boys could never afford armor and horses.
Once attention was won, keeping a relationship going brought new troubles. Medieval communities offered little privacy, with families in small households and neighbors deeply involved in one another’s affairs. Parents judged a match by property, inheritance and occupation, so a boy who believed himself charming might face a father worried by his lack of land. Rival admirers at festivals could produce arguments, and promises made in the present tense could carry binding consequences that ended up before church courts.
In the end, impressing a girl did not guarantee winning her. For many ordinary families, a young man’s occupation, reliability and ability to support a household mattered enormously, and a hardworking craftsman might be preferred over a charmer. Young women, though, could express preferences and accept or reject attention, within the limits of their circumstances. There was no universal medieval formula for romance.
Around 1200 BC, long before any of this, the ancient Mediterranean suffered a remarkable period of destruction. Powerful kingdoms collapsed, prosperous cities burned and trading networks that had linked civilizations for centuries began to fall apart. Among the mysterious groups appearing in the chaos were warriors that modern historians call the Sea Peoples.
For centuries the eastern Mediterranean had been dominated by powerful states. Egypt controlled the Nile Valley, the Hittite Empire ruled much of Anatolia, and wealthy coastal cities prospered by exchanging copper, tin, precious metals and luxury goods. It was an impressive international system, and a more fragile one than its rulers imagined.
Egyptian inscriptions name several groups, including the Sherden, Shekelesh, Peleset, Tjeker, Denyen and Weshesh. Modern scholars gathered several of them under the collective label Sea Peoples, but the Egyptians did not describe a unified nation. Their relationships, languages and homelands remain uncertain. Some reliefs show warriors in feathered or horned headgear, and some Egyptian accounts describe groups traveling with women, children and possessions, suggesting migrating communities rather than armies alone.
Much of what we know comes from the reigns of Merneptah and Ramesses III. Around 1207 BC, Merneptah confronted a coalition led by Libyan forces that included foreign warriors identified as Sherden, Shikalash, Eqwesh, Lukka and Teresh, and claimed a decisive victory. The most famous account came decades later, around 1177 BC, when Ramesses III described another confrontation with the Peleset, Tjeker, Shekelesh, Denyen and Weshesh. According to his inscriptions, they had overwhelmed several kingdoms before threatening Egypt.
Historians approach those claims with care, because royal inscriptions were meant to glorify the ruler, not report neutrally. The most striking evidence is at Medinet Habu, the mortuary temple of Ramesses III near modern Luxor, where reliefs show a naval battle with Egyptian archers attacking enemy ships, along with captives and families. The inscriptions do not say where every group came from, why they moved or whether they shared a leader.
The names themselves are puzzles. The Sherden, often shown in horned helmets and sometimes serving Egypt as mercenaries, have been linked to Sardinia, and the Shekelesh to Sicily, but similar-sounding names prove nothing alone. The Lukka are plausibly tied to Lycia in southwestern Anatolia, while the Eqwesh and Denyen have been compared with the Achaeans and Danaans of Homeric tradition, though those links are disputed. The Peleset are widely associated with the Philistines, but even that does not reveal one homeland.
One theory points to the Aegean, where many Mycenaean palace centers suffered destruction or abandonment around 1200 BC. Displaced inhabitants may have traveled east and joined the groups named in Egyptian records. Early Philistine sites do contain pottery and architecture showing western influences, but that does not show that every Sea People came from Greece.
Another possibility is western Anatolia, where weakening Hittite authority may have encouraged migration, raiding and new military alliances. People in the ancient Mediterranean were also highly mobile, with merchants, mercenaries and craftsmen traveling widely, so a warrior’s weapons or clothing do not reliably identify his homeland. Many historians now think the Sea Peoples were a mix of populations with different backgrounds and goals, moving over decades rather than in a single invasion.
That happened during the Late Bronze Age Collapse. Scientific studies suggest reduced rainfall in parts of the eastern Mediterranean, which could have hurt harvests, while earthquakes may also have played a part, though distinguishing quake damage from warfare is not straightforward. The Hittite Empire faced internal tensions and external threats, and Mycenaean palaces were destroyed or abandoned. Drought alone cannot explain every destroyed city.
The Sea Peoples may therefore have been both contributors to the violence and victims of the wider disruption. Egypt, unlike several neighbors, could organize a substantial response. Ramesses III prepared defenses by land and sea, and the reliefs at Medinet Habu depict a crowded naval battle in which ships were overturned and enemy soldiers fought at close quarters. Egyptian artists naturally preferred showing Egyptian victories, and the location of the battle remains uncertain.
Egypt survived the crisis, but victory did not restore the Bronze Age world. Trade had already suffered, and Egypt itself faced economic and political difficulties in the following generations. Some Sea Peoples did not simply vanish. The Philistines emerged in the early Iron Age in cities such as Ashkelon, Ashdod, Ekron, Gath and Gaza, and their link to the Peleset of Egyptian records is widely accepted, though the details of migration and settlement are debated.
Excavations at early Philistine sites have uncovered pottery with strong similarities to Mycenaean and other Aegean traditions. Pottery alone cannot identify a people, since communities can adopt objects through trade or imitation. Ancient DNA from burials at Ashkelon, however, suggests some early Iron Age individuals had ancestry connected with the Mediterranean west, an inheritance that faded as communities mixed with local populations.
The evidence supports migration, but not a single precise homeland. Other groups may also have settled along the coast, with the Tjeker sometimes connected to the region around Dor, though that remains uncertain. Some of these people did not remain wandering raiders but became farmers, merchants and craftsmen in established towns.
Were they truly the terrifying destroyers described by Egyptian propaganda? The traditional picture of mysterious invaders sweeping across the Mediterranean is dramatic, but archaeology is less tidy. Some cities were violently destroyed, while others declined gradually or kept functioning, and settlements destroyed around the same time were not necessarily attacked by the same enemies. Egyptian inscriptions mention the destruction of Hatti, yet they do not show that the Sea Peoples personally destroyed the Hittite capital.
Modern scholars increasingly treat the collapse as a series of interconnected crises, with drought, warfare, political fragmentation and economic disruption reinforcing one another. Some Sea Peoples may have contributed to destruction, while others may have been responding to the collapse of their own communities. A migrating group seeking land could become involved in violent conflict when kingdoms resisted its arrival, and appear as refugees in one place and invaders in another.
The mystery remains unresolved because most surviving written descriptions come from Egyptian officials who saw these groups as foreign enemies. They celebrated victories and said little about languages or family histories. Perhaps the Sea Peoples never considered themselves one people at all, and their descendants may have kept living, trading and raising families long after Egyptian scribes stopped naming them. The mysterious invaders may not have vanished so much as changed identity.
For now they remain a reminder that history preserves remarkable stories, but not always the answers.
