Mosteiro de Santa Maria de Seiça is an abandoned monastery located in Paião, a parish in the Figueira da Foz municipality. The first mention of this monastery in a document dated 1162. Given that it was founded by D. Afonso Henriques, who was the king of Portugal from 1143 to 1185, it is safe to speculate that it was founded between 1143 and 1162. D. Afonso Henriques was heavily involved in the Crusades and the Templar Order, thus combining political, military, and religious power. As a result, he oversaw the…