A Romanesque church was built here at the end of the 11C. In the 14C, Charles II the Bad undertook the construction of the Gothic church, although the work had to be stopped and the Romanesque choir remained. The central chapel contains a venerated statue of Santa María la Blanca, in Romanesque style and made from wood covered with silver plate. Every year since the 14C her feast day has been celebrated on the Sunday after the day of St Mark (25 April), with a traditional penitents' procession.