The Royal Monastery of San Lorenzo de El Escorial, is an immense palace built to commemorate the Battle of St. Quentin (1557), El Escorial is also an Augustinian monastery, museum, and library complex located at San Lorenzo de El Escorial. Designed by the architects Juan Bautista de Toledo and Juan de Herrera in an austere Herrerian classical style, and built from 1563 to 1584, it is shaped as a grid in memory of the martyrdom of Saint Lawrence. The complex has an enormous store of art, including masterworks by Titian, Tintoretto, El Greco, Velázquez, Rogier van der Weyden, Paolo Veronese, Alonso Cano, José de Ribera, Claudio Coello and others; its library containing thousands of priceless ancient manuscripts; and the complex has been designated an UNESCO World Heritage Site.