The Unfinished Chapels form a separate octagonal structure tacked on the choir of the church (via a retrochoir) and only accessible from the outside.

Former Dominican priory, dedicated to S Maria da Vitória, about 10 km south of Leiria, Portugal. Founded by John I (João I, reigned 1385-1433), the first king of the Aviz dynasty, to celebrate the Battle of Aljubarrota (1385), it is the most representative and important example of Late Gothic architecture in Portugal. The first architect, from 1388 to 1402, was Afonso Domingues, who drew up the plan and partly built the church and cloister. It is a large complex containing church, cloister, chapels, chapter house and other conventual buildings and a royal pantheon (the Capela do Fundador). Styles of Late Gothic used include Flamboyant, Perpendicular and Manueline. It is a UNESCO World Heritage Site.