Coordinates: 42°01′33.84″N 03°45′18.40″W / 42.0260667°N 3.7551111°W
The Lerma Ducal Palace is the palace of the dukes of Lerma in Lerma in Spain, occupying the whole of one side of the city's Plaza. Originally it had immense gardens below it, on the banks of the river, with fountains, stately homes and seven chapels, of which one (Cristo) remains. All documents relating to its construction have been conserved. A 17th-century work, building started in 1601 under commission from Francisco Gómez de Sandoval y Rojas, Duke of Lerma. Its architect was Francisco de Mora and is it is considered de Mora's masterwork and one of the finest buildings of that era.
During the Spanish Civil War the building was used as a prison. It is currently used as a parador.
The doorway is crowned by a frontispiece held up by columns. The large walnut door is decorated with 520 bronze nails. Above the door are two of the duke's coat-of-arms, decorated with laurel. The railings of the windows and balconies are painted blue and gold.
The interior of the patio round arches on each side. The columns are made of single pieces of granite (the quarries were owned by the duke). On the upper level the columns do not support arches, but rather a running frieze with iron balconies between them, and windows which were originally made from walnut wood.