A small basilican church with three naves, built as a funeral chapel for D. João III, the king who ordered that it be built in 1547.
This fine example of Italian Classicism, conceived by João de Castilho is the best evocation of Greek - Roman art in the Iberian Peninsula.
The application of the Florentine urban style is noteworthy, as are the austere sobriety of the proportions, the windows positioned according to the direction of the sun, and, inside, the interweaving of objects between the naves and the transept, the dramatic vibration of natural light and the Corinthian decoration on the capitals.


Chapel of Our Lady of the Conception: (Nossa Senhora da Conceição):
Chapel built between 1532 and 1540 in pure Renaissance style, begun by João de Castilho and finished by Diogo de Torralva. It was intended to be the burial chapel of King John III. Its beautiful and clear architecture turns it into one of the most remarkable early Renaissance buildings in Portugal.