The Royal Seat of San Lorenzo de El Escorial is a main attraction in Spain. It is located North West of Madrid. It was the largest building in the world for a long period of time. The Royal Seat of San Lorenzo de El Escorial is a historical residence of the King of Spain, in the town of San Lorenzo de El Escoria. It is one of the Spanish royal sites and functions as a monastery, royal palace, museum, and school. It is a vast building complex. This building is the most important architectural monument in the Spanish Renaissance. It has large towers and has four principles.