This museum in the Nossa Senhora da Oliveira convent has remarkable pieces of sacred art: altarpieces, paintings, sculptures, gold pieces (making up the main part of the treasure of the collegiate church) and clothes etc. Note the intricately crafted silver Manueline cross (16C) and the silver-gilt triptych said to have been taken by the king from the Castilians after the Battle of Aljubarrota (1385).