The clock tower at the entrance to Cartagena's Walled City, the Torre del Reloj, is one of the most photographed monuments in Colombia. Tourists pose under its yellow facade, holding cocktails or hats, framed by the arch of the Boca del Puente. The plaza directly inside the gate is full of horse carriages, candy vendors, and the smell of hot sugar from the portal de los dulces. The square is called the Plaza de los Coches, Square of the Carriages, because in the late 19th century, the city's coachmen parked their carts here.
That is its third name. Its second name was Plaza de la Yerba, after the grass that horses ate there. Its first name was Plaza de los Esclavos. The Slaves' Square. For most of the 16th, 17th, and 18th centuries, it was the city's primary slave market: the place where Africans who had survived the Atlantic crossing were displayed, examined, priced, and sold to plantations, mines, and households across Spanish South America. The arch you walk under to enter the Walled City is the same arch they walked under, in chains, going the other direction.
This is not a comfortable thing to write about. It is one of the more important things to understand if you want to take Cartagena seriously as a place rather than as a backdrop. The city's beauty is real. The history that produced that beauty is also real, and a meaningful chunk of it is brutal in ways that the daily flow of tourism does not naturally surface. This piece is an attempt to lay out what happened, where you can see it today, and how to engage with it respectfully.
Why Cartagena
The Spanish Crown formally regulated and channeled the trade in enslaved Africans through a small number of designated ports. Cartagena was one of three official slave-trading ports in the Americas (alongside Veracruz in New Spain and, later, Portobelo in Panama). The first major slaving voyages to Cartagena began in the 1570s; by 1580, the port had become the dominant entry point for the Spanish South American trade, and it would hold that position for roughly the next 160 years.
The geography made it inevitable. Cartagena's deep, defensible harbor was the safest Spanish port on the Caribbean. Its position let Spanish merchants distribute enslaved Africans inland, to the gold mines of Antioquia and the Chocó, to the haciendas of the Cauca and Magdalena valleys, to Quito and Lima and even the Potosí silver mines in what is now Bolivia. Cartagena was not the largest economy in the Spanish Americas. It was, however, the funnel through which the labor that built much of that economy passed.
The numbers are devastating and somewhat contested. The most cited figure for the cumulative total of enslaved Africans brought through Cartagena across the entire Spanish-period trade is roughly 1.1 million people [verify; some scholars give lower figures around 750,000-900,000, others higher]. The historian David Wheat has documented 463 individual slave ships arriving in Cartagena between 1573 and 1640 alone, carrying more than 73,000 enslaved Africans recorded by port officials, and that is only the portion that was officially registered. Smuggling, particularly during the period of the Iberian Union (1580-1640) when Portuguese traders held the asiento (the slave-trading contract), brought in many additional thousands.
Most of these people did not stay in Cartagena. They were sold and transported to mines and plantations across the continent. But many did stay, and their descendants are the foundation of modern Cartagena's substantial Afro-Colombian population.
The Middle Passage into Cartagena
The voyage from West and Central Africa to Cartagena typically took six to ten weeks. The ships were Portuguese for most of the early period, then Dutch, English, and French during various periods when those powers held the asiento. The conditions are well-documented and were appalling: 200-400 captives chained in holds with deck space measured in inches per person; rations of fouled water and biscuit; dysentery, smallpox, and "ship fever" running through the holds; mortality rates that, depending on the voyage and the period, ran from roughly 10% to over 25% per crossing. The Atlantic itself became, in the phrase of the historian Marcus Rediker, a kind of cemetery.
When the ships arrived in Cartagena harbor, captives who survived were unloaded into pens (corrales or barracones) along the city's waterfront and in the area immediately around what is now the Plaza de los Coches. They were held there, sometimes for weeks, to be cleaned up, fed enough to look healthier, examined by buyers, and then sold at auction.
This is where the figure of San Pedro Claver enters. The Spanish Jesuit priest, who arrived in Cartagena in 1610 and worked there until his death in 1654, made it his life's mission to meet every incoming slave ship at the dock with food, water, medicine, and Catholic baptism. He learned (with a team of African interpreters) some words of the captives' languages. He nursed the dying. He is recorded as having personally baptized approximately 300,000 enslaved Africans during his ministry [verify, this is the figure standardly cited in Catholic hagiography and is hard to confirm precisely, but even skeptical historians accept that he ministered to tens of thousands at minimum]. He called himself "el esclavo de los esclavos", the slave of the slaves. He was canonized in 1888 and named patron saint of all enslaved people and the African missions in 1896.
The honest assessment of San Pedro Claver is mixed. His personal heroism is unquestionable; he spent forty years doing the most difficult, lowest-status work in colonial Cartagena out of conviction. He was also a Jesuit working inside the slave system, not against it. His ministry treated the symptoms, the suffering of the recently arrived, without challenging the institution that produced the suffering. Modern historians generally treat him as a complicated, real, important figure: not the hero of a simple morality tale, but a man who chose, day after day for forty years, to share the worst place in his city with the people no one else cared about.
His church and museum, the Iglesia de San Pedro Claver and the attached Museo Etnográfico Afroamericano, are essential visits in the Walled City, and the museum is the city's most serious public engagement with this part of its history.
The Inquisition and its uses
Across Plaza de Bolívar from San Pedro Claver's church stands the Palacio de la Inquisición. The Holy Office of the Inquisition was established in Cartagena in 1610 and operated, with periodic interruptions, until Colombian independence in the early 19th century. The current Palacio de la Inquisición building was completed in 1770; over the course of the Inquisition's operation in the city, more than 800 people were tried as heretics, and not a single one of those 800 was found innocent.
The Inquisition's victims were a specific and revealing list. Many were women accused of witchcraft, particularly Indigenous and Afro-descendant women whose surviving spiritual practices the Catholic church classified as devil-worship. Many were Sephardic Jews, Portuguese Jewish merchants who had come to the city in the 16th and 17th centuries, often in the slave-trading business. Many were Protestants and other religious dissidents. The Inquisition explicitly did not have jurisdiction over Indigenous people (who were technically considered "neophytes" needing instruction rather than punishment), but it did have jurisdiction over Africans and Afro-descendants, and a substantial portion of its workload involved disciplining African religious practices that survived inside enslaved and freed Black communities.
The Palacio is now the Museo Histórico de Cartagena, and the second floor includes a serious treatment of the slave trade and its connection to the Inquisition's project of religious and racial control. It is, with the San Pedro Claver museum, the most important historical visit in the Walled City.
Resistance: cimarrones and San Basilio de Palenque
The story is not only one of suffering. From very early in the slaving period, enslaved Africans escaped, into the swamps, jungles, and hills inland from Cartagena, and built fortified communities called palenques. The escapees were called cimarrones (from which the English word "maroon" derives). The palenques sustained themselves through farming, hunting, raids on Spanish settlements, and the constant absorption of newly escaped people from the city.
The most successful and historically significant of these communities was founded around 1603 by Benkos Biohó, an African man who had been born free in the Bijagós Islands off present-day Guinea-Bissau, captured into slavery, and escaped from Cartagena in 1599. Biohó's community in the foothills of the Montes de María, southeast of Cartagena, grew strong enough that the Spanish military repeatedly failed to destroy it. In 1605, the Spanish Crown signed a peace treaty with Biohó, recognizing, for the first time anywhere in the Americas, a self-emancipated African community as a free territory.
The treaty did not last; Biohó was captured by Spanish forces and hanged in 1621. But the community survived, and a series of further treaties and royal certificates through the 17th century, culminating in a royal cédula of 1691 ordering general freedom for the palenques, gave the community its eventual stable autonomy. That community, San Basilio de Palenque, still exists today. It is the first free African town in the Americas. UNESCO declared its cultural space a Masterpiece of the Oral and Intangible Heritage of Humanity in 2005. (See our deeper piece on the palenqueras of Cartagena for the village's story and its connection to the city.)
The point of San Basilio de Palenque, in the context of the slave trade, is essential: the system was not total. It was resisted from the moment it began. Some of the people who arrived in chains escaped, organized, and built free societies. Their descendants are still here.
Abolition
Slavery in what is now Colombia was abolished in stages over several decades. In 1821, the new republic of Gran Colombia passed a "free womb" law (Ley de Vientre Libre) declaring that children born to enslaved women after that date would be free upon reaching their 18th birthday. The law was full of loopholes, masters could effectively keep "freed" children indentured well past adulthood, and full chattel slavery continued legally for another three decades.
The definitive abolition came under the liberal government of President José Hilario López. The Colombian Congress passed the abolition law on May 21, 1851, with effective date January 1, 1852. According to official statistics from 1851, 16,147 enslaved Afro-Colombians were directly freed by the law. Slaveowners were compensated by the state with bonds; the formerly enslaved received nothing.
Colombia was, with this law, one of the earlier countries in the Americas to abolish slavery, earlier than the United States (1865), Cuba (1886), and Brazil (1888). But the structural inequalities created by 270 years of slavery did not end with the law, and many of them are still visible in Cartagena today, in the city's racially correlated geography of poverty and wealth.
What you can actually visit, and how to visit it respectfully
Most of the physical sites of Cartagena's slave history are still standing. None of them are ruins. They are integrated, often invisibly, into the daily life of the city. Visiting them seriously means visiting them with awareness of what they are.
Plaza de los Coches. Just inside the Torre del Reloj. Stand under the arch and recognize that you are standing in the central slave market of Spanish South America for the better part of two centuries. The plaza has no formal monument or plaque to this fact, a real and ongoing absence, but the recognition is the point.
Museo Histórico de Cartagena (Palacio de la Inquisición). Plaza de Bolívar. Open Tuesday-Saturday, roughly 9 AM-6 PM; entry around COP 22,000 [verify current price]. The slavery section on the second floor is the most thoughtful public treatment in the Walled City.
Iglesia y Museo de San Pedro Claver. Just off Plaza de San Pedro. Open daily, around COP 16,000 [verify]. The museum behind the church (the Museo Etnográfico Afroamericano) contextualizes Claver's ministry within the slave system.
Plaza de la Aduana is where the customs house once registered every cargo, including human cargo. The statue of Christopher Columbus that stood at its center has been removed in recent years [verify current status, as the statue has been a subject of ongoing debate]; the plaza now reads more openly as the colonial commercial heart it always was.
Convento de la Popa, on the hill above Cartagena, was an Augustinian monastery; the slopes around it included slave-supplied stone quarries used to build the city's walls. The view from the top of the hill, over the harbor, is the view incoming slave ships saw as they arrived.
Las Murallas, the Walled City's famous fortifications, were built over more than 200 years, primarily by enslaved African and Indigenous labor. Walking the walls at sunset, recognize whose hands cut and stacked the stone.
San Basilio de Palenque. A day trip 50 km inland; tours from Cartagena run COP 180,000-300,000 per person and include lunch, a walking tour, and time with community guides. The most important single thing you can do to understand this history.
How to visit respectfully: read first, photograph less, ask before photographing people, pay community guides directly when possible, support Afro-Colombian-owned businesses, listen. The Plaza de los Coches looks beautiful at sunset because it is beautiful, and because the people who survived what happened there built a city worth celebrating despite it. Both things are true. The work of the visitor is to hold both.
Why this matters now
You cannot understand Cartagena, its food, its music, its language, its neighborhoods, its politics, its present, without understanding that it was built on, and through, the slave trade. The Walled City's beauty is real, but it is the beauty of a place built by the labor of people who were treated as cargo. The city's culture is real, but it is the culture of the descendants of those people refusing to be erased. The country's most beloved music came out of barrios that were, for centuries, dismissed as the music's source.
Holding this history in mind does not ruin the visit. It deepens it. The cocktail you drink under the clock tower tastes the same. The sunset over the walls is the same color. But you walk through the city as a person who knows what it is, which is the only way to walk through any place worth knowing.
Related reading on thecartagena.guide: The African Influence on Cartagena | The Palenqueras of Cartagena | Champeta: How Cartagena's Sound Conquered Colombia. For broader Caribbean Colombia context, see barranquilla.guide.
Sources for further reading: Aline Helg, Liberty and Equality in Caribbean Colombia, 1770-1835 (UNC Press); David Wheat, Atlantic Africa and the Spanish Caribbean, 1570-1640 (UNC Press); Marixa Lasso, Myths of Harmony: Race and Republicanism during the Age of Revolution, Colombia 1795-1831 (University of Pittsburgh Press); UNESCO documentation on Palenque de San Basilio.