The decision to take down historic William Beckford and John Cass sculptures could go against new UK government policy

Review of state art collection is part of move to make it “more representative of diversity”

Afro-Atlantic Histories, which opened in São Paulo in 2018, tells the story of the transatlantic slave trade and its legacies

Structural glass replaces missing walls and floors of a 1769 house, exposing indelible links to slavery

The historic documents “highlight the complexities of documenting America’s ‘peculiar institution’”

The Unesco-listed site is due to receive a museum of Afro-Brazilian culture