The slave ship Maria arrived with enslaved Africans in Brazil. About 448 people had been taken aboard and approximately 379 arrived.

Vessel: Maria; flag: Portugal / Brazil; rig: Galera. People recorded in connection with the voyage: Investor: Caldeira, Antônio da Silva; Captain: Marta, Inácio Alves; Captain: Lopes, João Crisóstomo Rodrigues. The voyage began at Rio de Janeiro on 25 May 1821. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 40 days. Estimated mortality during the crossing: 15.0%. Recorded outcome: Voyage completed as intended.