Of this old 14th century palace, built by Pedro Suárez de Quiñones and his wife Juana González de Bazán, the central body of the façade is preserved, with three coats of arms, the central one of the Quiñones family and the side ones of the Bazán family. It is built of ashlar stone, and is about eleven metres wide. The doorway is Gothic with a lintel over modillions, a large pointed arch covers the tympanum, and is framed in wide moulding.

Catalina Pimentel enlarged it by building the three-storey Renaissance tower with a cushioned masonry and green slate panels. The window sills show the sands of the Quiñones surrounded by fruit motifs.

The Inquisition Court was housed in this palace for many years. It was declared a Historical Monument in 1931, and is owned by the Octavio Álvarez Carballo Foundation.

It has been completely restored and is used as a venue for temporary exhibitions. It has also been partially ceded by the City Council of León to the University of Washington, which uses the building as its headquarters in Spain for its students to learn Spanish.