La Ventosilla is a large "country house" near Burgos in Spain that was built at the start of the seventeenth century for Juan Fernandez de Velasco, the Constable of Castille.

Two military engineers in the service of the king were commissioned for the construction, Tibúrcio Spannochi and Jeronimo del Soto.

A color drawing from that time has been preserved in the library of the royal palace, representing the whole territory of the Ventosilla, surrounded by forest.

[6] The property was inherited by Francisco Gómez de Sandoval, Duke of Lerma, and he may have initiated some changes to the original building.

[5] Lerma was a favorite of Philip III of Spain, and the two men would have used the privacy of the house to relax and also to deal with state affairs uninterrupted.