Lerma Ducal Palace

The Lerma Ducal Palace stands tall in Lerma, Burgos, Spain, occupying one side of the city's Plaza. Commissioned by Francisco Gómez de Sandoval y Rojas, Duke of Lerma (not for his father), between 1600 and 1605, it is considered Francisco de Mora's masterwork and one of the finest buildings of the era. The palace features a stunning façade, with a large walnut door decorated with 520 bronze nails and the duke's coat-of-arms adorned with laurel. The interior of the patio features round arches, single piece granite columns, and windows originally made from walnut wood. Four towers stand at the corners, with their spires having been restored in recent times. The palace was granted the privilege to have more than the usual two towers for a palace not due to the Duke of Lerma, but due to the architect, Francisco de Mora.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons