Palace of La Isla, Burgos, Manor house on Paseo de la Isla, Burgos, Spain

The Palace of La Isla is a manor house built in 1883 on the Paseo de la Isla in Burgos, in a romantic style with neo-Gothic influences. It was commissioned by the lawyer and banker Juan Muguiro y Casi as a summer residence, and it was declared a cultural interest site in 1942.

The building was commissioned in 1883 and originally served as a summer residence for a wealthy family. During the Spanish Civil War, Francisco Franco used it as his headquarters from 1937 to 1939.

Since 25 April 2008 the palace has housed the Instituto de la Lengua de Castilla y León. Since March 2026 it has also housed the Academia Burgense de Historia y Bellas Artes, the Institución Fernán González. The building previously gave temporary shelter to other bodies, such as the Grupo Espeleológico Edelweiss and the Burgos National Police station.

The palace stands on Paseo de la Isla, on the bank of the Arlanzón, a short walk from Burgos cathedral and reachable on foot along the river promenade. It is the seat of the Instituto de la Lengua de Castilla y León, so access is tied to the institution's activity rather than to regular monument opening hours; check before going.

Miguel Ángel de Muguiro, son of the banker who built the palace, served as chargé d'affaires at the Spanish embassy in Budapest and helped save Jews persecuted by Hungary's pro-Nazi government. A Council of Ministers meeting was held here in 1947, in a room lent by the adjoining Monasterio de la Visitación because the palace lacked space.