Alcazar Palacio Portocarrero dominates Palma del Río's landscape, nestled against the 12th-century Almohad fortification walls that encircle the historic center. Its history encompasses Roman origins dating to 105 CE when the proconsul Aulo Cornelio Palma established his residence at this strategic confluence of the Genil and Guadalquivir rivers. The 11th-century Caliph Yusuf ordered construction of an alcázar combining residential, religious, and defensive functions with six crenellated towers. Renaissance reforms during the 15th-16th centuries transformed it into the counts' palatial residence. Today the palace features elegant Renaissance chambers, porticoed courtyards, and Hispano-Mudejar gardens housing over 400 citric varieties, while its architectural ensemble reflects layered contributions from Roman, Arab, Jewish, and Christian civilizations.