Cartagena, Spain: The City Hannibal Launched His March on Rome From

1. First things first: this is the original Cartagena

The confusion is constant and completely understandable. Ask most English-speakers to name a Cartagena and they will describe a walled colonial city on the Caribbean coast of Colombia. That city is extraordinary — but it was named after this one. Spanish colonists sailing from this southeastern Mediterranean port carried the name to South America in the 16th century.

Spain's Cartagena sits on a natural harbor protected by five hills in the Murcia region, about 50 kilometers southeast of Murcia city. Its position made it one of the most strategically valuable ports in the ancient Mediterranean — which is exactly why the Carthaginian general Hasdrubal the Fair chose the site in 229 BC and built a city he called Qart Hadasht, meaning 'New City' in Phoenician. The same root gave the Tunisian city its name: Carthage.

For most of its history, Cartagena has been defined by military value. The harbor's natural depth and the surrounding hills made it a defensible stronghold that every power in the western Mediterranean wanted to control. Several of them did, in succession, leaving archaeological and architectural layers that the modern city has not entirely managed to build over.

2. Qart Hadasht, Carthago Nova: how Hannibal's headquarters became a Roman city

By the time Hasdrubal was assassinated in 221 BC, Qart Hadasht had become the nerve center of Carthaginian power in Iberia — a military base, a silver-mining hub, and the staging point for one of the most audacious campaigns in ancient history. Hasdrubal's successor, Hannibal Barca, used the city to assemble an army of around 90,000 infantry, 12,000 cavalry, and 37 war elephants before crossing the Pyrenees and Alps to invade Italy in 218 BC — a campaign that kept Rome in genuine existential crisis for 17 years.

The city he left behind became Rome's primary target in Iberia. In 209 BC, the Roman general Publius Cornelius Scipio (later awarded the cognomen Africanus for his defeat of Hannibal in North Africa) launched a combined naval and land assault and captured the city in a single day. Ancient sources, including Polybius and Livy, describe the operation precisely: Scipio sent infantry wading through a lagoon at low tide to scale the northern walls while the main assault engaged the harbor fortifications, splitting the garrison's attention.

The Romans renamed the city Carthago Nova and made it the most important Roman settlement in Iberia after Tarraco (modern Tarragona). At its 1st-century BC peak, Carthago Nova had an estimated population of 40,000 and its surrounding silver mines — worked by tens of thousands of slaves — contributed substantially to Rome's military revenues. That wealth funded the civic buildings whose ruins are visible today.

3. What the archaeology looks like on the ground

Cartagena has been continuously inhabited for over 2,300 years, which means its ancient layers are not preserved in a field outside town — they are embedded inside a functioning city, accessible on foot between a cafe and a supermarket. Three sites deserve careful attention.

The Roman Theatre of Cartagena on Calle Honda was one of the largest theatres in the western Roman Empire, with a seating capacity of approximately 7,000. Built in the 1st century BC, probably under Augustus, it fell into disuse and was literally built over: a medieval castle, then a church, then an entire urban block accumulated on top of it over 15 centuries. The theatre was only rediscovered during routine construction work in 1988. The excavation required carefully dismantling medieval and early modern structures above it — a process that took decades. The adjacent museum is built directly around the ruins, and visitors exit through the theatre's vaulted service galleries onto the open cavea (seating area), looking down at the original stage with the harbor visible in the distance beyond it.

The Punic Wall on Plaza Bastarreche is one of the most significant Carthaginian architectural remains in Spain — a fortification from the 3rd century BC built in large sandstone blocks. Most Carthaginian construction in Iberia was demolished or absorbed into later structures; this wall survived because Roman builders incorporated it into the city's subsequent defensive circuit. The small museum around it displays Punic-era armor, weapons, and amphorae recovered from the harbor.

The Roman Forum at Molinete Hill (Parque Arqueologico del Molinete) covers the largest urban Roman archaeological park in Spain. Molinete was the location of Carthago Nova's forum district — the civic, religious, and commercial center. Excavated remains include an Augusteum (temple dedicated to the imperial cult of Augustus), a curia (city council chamber), public baths, and stone-paved streets. The site is open-air, embedded in the modern city, with apartment blocks on the surrounding streets and the Roman structures exposed and labeled below. The disorientation of scale — a Roman civic center surrounded by 21st-century residential buildings — is one of the stranger and more memorable things Cartagena has to offer.

4. The Carthaginians and Romans Festival: 6,000 people reenact the siege

Every year for the last ten days of September, Cartagena holds the Fiestas de Carthagineses y Romanos — a historical reenactment festival with a scope that has no real parallel in Spain. More than 6,000 residents participate as members of the Carthaginian or Roman side, organized into approximately 30 troupes (penas) that each represent a specific historical contingent: Hannibal's elite Numidian cavalry, Roman legionary cohorts, Iberian allied troops, the priestesses of the goddess Tanit.

The festival includes theatrical performances staged at historically specific sites across the city: the Foundation of Qart Hadasht performed at the Punic Wall, the Weddings of Hannibal and his Iberian wife Himilce, a Session of the Roman Senate, and Scipio's Landing reenacted at the harbor. The climax is a night-time reenactment of the Battle for Qart Hadasht.

The Grand General Parade — all 6,000 participants in full historical costume marching through the city center — typically takes place on the penultimate Saturday evening, starting around 18:30 on Paseo Alfonso XII and moving through Calle Mayor. Costume quality is exceptionally high: the troupes are funded and organized year-round, and their regalia — including hand-forged metalwork and period-accurate textiles — is the product of sustained collective craft. The festival holds a designation as a Fiesta of International Tourist Interest, a classification it shares with La Tomatina in Bunol and the Running of the Bulls in Pamplona.

5. The Naval Museum and the Isaac Peral submarine

Cartagena has been Spain's primary Mediterranean naval base since Philip II established the Arsenal here in the 16th century. The Museo Naval (Naval Museum) on Paseo Alfonso XII, at the port's edge, covers that history from the age of oared galleys to the 20th century — and it is free to enter, a fact that is not well advertised anywhere.

The centerpiece of the collection is the Isaac Peral submarine, built in 1888 by the Spanish naval engineer and inventor Isaac Peral, who was born in Cartagena. The Peral submarine was the world's first fully electric-powered, torpedo-armed submarine capable of actually submerging, navigating under power, and firing weapons — predating Gustave Zede's French submarine by three years and John Holland's American designs by a decade. A combination of military bureaucracy and institutional resistance sidelined Peral's design before it could be adopted operationally, but the submarine itself survived and is displayed at full scale in the museum's main hall, framed by two large anchors at the building's entrance on Paseo Alfonso XII.

The walk along the harbor promenade to reach the museum — past the 19th-century arsenal buildings that still house an active naval base — gives a sense of the military-industrial scale Cartagena maintained for four centuries. The museum exhibits also cover nautical cartography, naval art, flags, uniforms, and ship models spanning from the 16th century forward.

6. Art Nouveau in a 2,300-year-old port city

The late 19th and early 20th centuries brought an architectural layer to Cartagena that most visitors don't anticipate: a cluster of Art Nouveau and early modernist buildings funded by profits from the Murcia region's silver and lead mining boom. Several of the city's most striking facades are within a few blocks of the Plaza del Ayuntamiento and along Calle Mayor.

The Casino de Cartagena at Calle Mayor, 15 is one of the clearest examples — a 1907 building with an ornate neo-Baroque facade incorporating ceramic panels and wrought-iron balconies. The Palacio Aguirre on Plaza de la Merced, completed in 1901, has a domed corner tower visible from the surrounding streets. The Consistorial Palace (Town Hall) on Plaza del Ayuntamiento is an early 20th-century modernist civic building with a tiled interior courtyard.

These buildings stand less than 200 meters from the Roman Theatre entrance — a compressed architectural timeline from the 1st century BC to 1907 that is walkable in under 20 minutes. The contrast between the city's ancient military identity and the ornate civic confidence of its mining-era prosperity is one of the more visually interesting things about Cartagena and one of the least discussed.

7. What to eat in Cartagena

Cartagena's food is Mediterranean Murcia: fresh catch from the Mar Menor lagoon and the open coast, vegetables from the surrounding market gardens (the Murcia plain is one of Europe's most productive), and a handful of local dishes specific enough that you won't find them elsewhere in Spain.

8. Getting there and practical guide

Cartagena receives fewer international visitors than its historical weight justifies — partly because it lacks a direct high-speed rail connection, and partly because Murcia has lower travel profile than Andalusia or Catalonia. Both are reasons to go before the crowds catch up.