Seriki Faremi Williams Abass Slave Museum, Badagry. Barracoon is a Portuguese word meaning 'slave cell'. Built in early 1840s, the slave museum is a historic treasure trove containing 40 cells where slaves were kept and sold, slave tools, artifacts and hand written documents of Chief Seriki Faremi Williams Abass, a former slave turned merchant and owner of the Barracoon. The museum is located in Badagry, Lagos.