Cape Coast Castle and the Atlantic Slave Trade

Portuguese traders established Cabo Corso—“Short Cape”—as a trading station in 1555. Swedish merchants built a permanent fort there in 1653, named Carolusborg after King Charles X Gustav. Control passed through Danish, Dutch and local hands before an English fleet seized it in 1664. The Royal African Company administered it from 1672; the African Company of Merchants assumed responsibility in 1750. Britain abolished its slave trade in 1807, but retained Cape Coast Castle as a colonial administrative center until 1877.

Year	Event	Institution or power
1555	Portuguese trading post established at Cabo Corso	Portugal
1653	Permanent Carolusborg fort constructed	Swedish Africa Company
1664	English forces capture the fort	English Crown interests
1672	Chartered monopoly begins operating	Royal African Company
1750	Castle passes to a successor company	African Company of Merchants
1807	British participation in the trade becomes illegal	Slave Trade Act 1807
1877	Gold Coast capital moves from Cape Coast to Accra	British colonial government
1957	Ghana achieves independence	State of Ghana

Cape Coast Castle did not operate in isolation. Warfare, raiding, kidnapping, judicial enslavement and debt supplied captives from the coast and interior. African merchants and political authorities conveyed prisoners through inland markets to European forts. Europeans supplied trade goods and Atlantic shipping, imposed racial property law in their colonies and generated sustained plantation demand.

The castle’s architecture organized people as cargo. Men and women were separated in underground chambers, guarded and inspected; traders negotiated prices above them. Captives selected for export were branded in parts of the wider trade, moved through the seaward gate, loaded into boats and taken to offshore vessels. Water shortages, disease, violence and inadequate sanitation made confinement lethal, although no reliable castle-specific death register survives.

1. Captives were seized or sold through inland and coastal networks.
2. Brokers transported them to Gold Coast markets and forts.
3. Company officers exchanged textiles, metals, firearms, alcohol and cowries for people.
4. Guards confined captives until a ship and commercially acceptable group were available.
5. Boats carried captives through the surf to slave ships.
6. Survivors were sold in Atlantic plantation societies under hereditary racial slavery.

“The stench of the hold while we were on the coast was so intolerably loathsome, that it was dangerous to remain there for any time.” — Olaudah Equiano, 1789, The Interesting Narrative of the Life of Olaudah Equiano.

No defensible total exists for people exported specifically through Cape Coast Castle. Claims that assign millions to this single building generally lack surviving voyage-level evidence and risk confusing the castle with the entire Gold Coast. The best quantitative framework is the SlaveVoyages database: its 2019 estimates indicate approximately 12.52 million Africans embarked across the Atlantic between 1501 and 1866, with about 10.70 million disembarking alive—a Middle Passage loss near 1.82 million, or 14.5%.

Measure	Years	Estimate	Source or basis
Africans embarked in the transatlantic trade	1501–1866	about 12.52 million	SlaveVoyages estimates, 2019 release
Africans landed alive	1501–1866	about 10.70 million	SlaveVoyages estimates, 2019 release
Deaths during Atlantic crossing	1501–1866	about 1.82 million	Difference between SlaveVoyages estimates
Embarked from the Gold Coast region	1501–1866	roughly 1.2 million	SlaveVoyages regional estimates; boundaries and missing voyages create uncertainty
Recorded Royal African Company captives embarked	1672–1713	about 150,000	Company records synthesized by historian K. G. Davies, 1957

Gold Coast totals cover multiple ports—not Cape Coast alone—and exclude people killed during capture, marches or confinement. Historians also disagree over the regional total because voyage records are incomplete and embarkation-zone boundaries vary; published database revisions should therefore be treated as ranges rather than exact censuses.

Key facts

• Cape Coast Castle became an English possession in 1664 and a British headquarters in 1665.
• Approximately 12.52 million captives embarked from Africa between 1501 and 1866, according to SlaveVoyages’ 2019 estimates.
• Approximately 10.70 million reached the Americas alive; about 1.82 million died during the crossing.
• The Gold Coast embarkation region accounts for roughly 1.2 million people, but no sound castle-only total exists.
• Britain prohibited its subjects’ slave trade in 1807, decades before abolishing colonial slavery in 1833–1838.

Profit moved through a chain rather than remaining at the castle. African rulers and merchants received imported goods; European companies collected commissions and monopoly returns; shipowners, captains, provisioners and insurers earned fees; plantation owners extracted unpaid labor; metropolitan merchants financed crops and re-exported sugar, tobacco, cotton, coffee and rum.

The Royal African Company was founded in 1672 under Charles II, with his brother James, Duke of York, as governor. Its monopoly joined royal power to private capital. Gold Coast purchases commonly involved textiles, iron and brass goods, firearms, gunpowder, alcohol and currencies such as cowries. Exact Cape Coast revenues are fragmentary and cannot responsibly be converted into a single profit figure.

Commercial measure	Years	Figure	Qualification
Royal African Company captives transported	1672–1689	about 90,000–100,000	Range reported from company-era records by modern historians
Royal African Company captives transported	1672–1713	about 150,000	K. G. Davies, 1957; empire-wide, not Cape Coast-only
Estimated Atlantic embarkations	1501–1866	12.52 million people	SlaveVoyages, 2019; people were treated as commercial units
Estimated Atlantic arrivals	1501–1866	10.70 million people	SlaveVoyages, 2019

Cape Coast’s accounts cannot be read as neutral business records: every “piece,” price and loss represented a person subjected to sale, confinement and forced removal.

Resistance occurred throughout the system: people fled captors, attacked escorts, refused food, damaged ships, preserved languages and spiritual practices, and rebelled at sea and in the Americas. Because company records prioritized inventory and discipline, many acts survive only as punishments, “losses” or complaints.

Gold Coast politics also constrained European power. Forts depended on African food supplies, brokers, military alliances and permission from local authorities; Europeans did not simply control the interior. That dependence does not erase collaboration or responsibility. It identifies the actual mechanism: unequal but negotiated coastal commerce feeding a European-built oceanic market and American plantation regimes.

Abolition resulted from sustained Black resistance and organized campaigning, not imperial benevolence. Ottobah Cugoano, born in the Gold Coast region and enslaved as a child, demanded abolition in his 1787 Thoughts and Sentiments on the Evil of Slavery. Britain’s Slave Trade Act received royal assent on March 25, 1807; the Slavery Abolition Act received assent on August 28, 1833, with emancipation beginning on August 1, 1834 and apprenticeship largely ending in 1838. British taxpayers compensated slave owners with £20 million in 1835—about 40% of government expenditure that year—while formerly enslaved people received nothing.

Cape Coast Castle became a Ghanaian national monument after independence in 1957 and forms part of UNESCO’s Forts and Castles, Volta, Greater Accra, Central and Western Regions, inscribed in 1979. It is now a museum, memorial and pilgrimage site, especially for African-descended visitors.

Public memory requires precision. Calling the building merely a “trading post” obscures that humans were traded there. Presenting European and African participation as equivalent obscures control over Atlantic shipping, colonial slave law, plantation demand and accumulated imperial capital. Conversely, attributing every Gold Coast embarkation to Cape Coast Castle inflates what the evidence can prove.

The castle matters now because wealth and inequality outlived legal abolition. Profits, commodities, ports, financial institutions and family fortunes linked Britain and other Atlantic powers to slavery, while colonized societies inherited violent borders and extractive economies. Responsible commemoration pairs the physical dungeons with voyage data, company records, African political history and descendant testimony. The relevant task is neither patriotic absolution nor spectacle, but documented accountability.

• SlaveVoyages: Trans-Atlantic Slave Trade Database
• UNESCO: Forts and Castles, Volta, Greater Accra, Central and Western Regions
• Encyclopaedia Britannica: Cape Coast Castle
• University College London: Legacies of British Slavery
• British Library: The transatlantic slave trade
• Smithsonian National Museum of African American History and Culture: The Door of No Return