Located in the square of the same name, this monastery of nuns of the Military Order of Santiago was founded by King Phillip IV in 1650. Designed by the architects Manuel and José del Olmo, its most notable element is undoubtedly the church, with a Greek cross floor plan and outer sections in a semi-circle, a beautiful dome over pendentives and pillars chamfered in the centre.

The façade consists of an entry portico formed by three rounded arches flanked by two towers. The upper niche holds an interesting group of sculptures that represents Santiago Matamoros. The facilities of the convent, that for over a century consisted simply of some houses around the church, were reorganized by Francisco Sabatini in 1773.

The property was declared a Site of Cultural Interest in the category of Monument in 1970.

In 2020, the second phase of the building’s refurbishment is going to be carried out, with structural consolidation and restoration of the church, entranceway and the Convent towers, in order for it to be opened to the public.