The Church of Santa Cruz, at the foot of the old town, contains the tombs of Portugal's first two kings: Afonso Henriques, who founded the country in the 12th century, and his son Sancho I. The church has been heavily remodelled over the centuries — the Manueline façade and the interior stonework date mostly from the early 16th century — but it remains one of the most historically charged buildings in Portugal.
The sacristy houses a small collection of 16th-century paintings depicting the life of Saint Augustine. Attached to the church is the Jardim da Manga, a small Renaissance fountain garden that was part of the original monastery cloister. The square in front of the church is one of the most pleasant places to sit in the lower town.