This church built in the 12C was modified significantly in the 17C. The interior decor is resolutely Baroque and is home to paintings attributed to the artist Gaspar Vaz, including a remarkable St Peter (third chapel on the right), 18C azulejos and, first and foremost, a 14C monumental granite tomb decorated with low-reliefs representing a wild boar hunt. It is also the resting place for the remains of Dom Pedro, Count of Barcelos, the illegitimate son of King Denis and author of the General Chronicle of 1344.