Castillo de Cogolludo

Castillo de Cogolludo is a fortified ruin in Cogolludo, Guadalajara province, Castilla-La Mancha, with origins in an Islamic fortress dating to the 9th and 10th centuries. A Christian castle was constructed atop the Muslim foundations in the 11th century, subsequently controlled by the Order of Calatrava before passing to prominent noble families including the Mendozas and eventually the Dukes of Medinaceli. The castle's distinctive pentagonal floor plan features towers at each corner, with a notable 10th-century brick tower with a half dome still preserved despite French damage during the Spanish War of Independence. Designated a Cultural Heritage Site, the ruins remain accessible to visitors seeking to explore its layered medieval history.