Forte de Santo Inácio de Tamandaré, Colonial fortress in Tamandaré, Brazil.

Forte de Santo Inácio de Tamandaré is a stone fortress rebuilt from 1808 under governor Caetano Pinto de Miranda Montenegro, with a quadrangular plan and pentagonal bastions at the corners in the Vauban style. A two-storey building on the landward side held the guard corps, powder house, barracks and command quarters. The Tamandaré Lighthouse has stood within the fort since 1902.

João Fernandes Vieira ordered a campaign redoubt at Tamandaré in July 1645. Dutch admiral Jan Cornelisz Lichthart captured and enlarged it after the Battle of Tamandaré Bay on 9 September 1645. Vieira rebuilt the fort in 1677 with stones shipped from Porto Calvo, Alagoas, and Francisco Pinheiro completed new works in 1691. Governor Caetano Pinto de Miranda Montenegro rebuilt it from 1808 in Vauban style.

The fort's chapel was only built in 1780, under the invocation of Saint Ignatius, more than a century after the 1677 reconstruction. The site's name, Forte de Santo Inácio de Tamandaré, combines this dedication with the Tamandaré cove where the fort stands.

The site is supervised by the Brazilian Navy and open for visits. Wear sturdy shoes since the stone structures and paths can be uneven.

The fort housed the Tamandaré Lighthouse from 1902 and has been under the jurisdiction of the Brazilian Navy since 1978. A commemorative plaque from 1991 records its rebuilding under governor Caetano Pinto de Miranda Montenegro, and the site was assessed by the Archaeology Laboratory of the Federal University of Pernambuco in September 1997.