The Cathedral of Aveiro (Portuguese: Sé de Aveiro), also known as the Church of St. Dominic (Portuguese: Igreja de São Domingos), is a Roman Catholic cathedral in Aveiro, Portugal. It is the seat of the Diocese of Aveiro and built in Portuguese Baroque. It was founded in 1423 as a Dominican convent. Since 6 March 1996, it is on the register of National monuments of Portugal.[1]