The first documents of Baena Castle date at the beginning of the 9th century (890), during the reign of Emir Ahdullah, whose Governor in Regio since 889 had been Omar Ben Hafsum who rebelled and took Baena in 891.
In 1228, the governor of Fernando III in Baeza attacked the castle, belonging then to Seville. Subsequently the castle was attacked by Mohamed, the king of Granada, 1297. In July 1320 a peace treaty was signed in this castle between the Alonso XI and Ismail, King of Granada, which guaranteed this peace for eight years. In 1332, this same Alfonso XI garrisoned the castle in the face of danger from Granada, and in 1341 he left Baena to attack the Nasrid kingdom, not before providing the fortress with men and materials. In 1362 Abu Said, King of Granada, the Bermejo, took refuge in Baena and was accompanied to Seville by people from Cordoba.
In 1401 the castle was ceded by Henry III to the Marshal, Don Diego Fernández de Córdoba, with the opposition of the inhabitants of the city, taking possession of it in 1438.
Since the 16th century it has been used as the Palacio de los Duques. Diego Fernández de Córdoba, III Conde de Cabra, established his residence in the castle at the beginning of the 16th century and gave it a more palatial character. In 1520 the Baena and Condado de Cabra estate became related by marriage to the Duchy of Sessa. En 1566, by a Royal Decree of Philip II, Baena became the Duchy of Baena whereupon the lords of Baena came to be the Dukes of Sessa and Baena. It is from that time when there began to be a succession of structural changes in the fortified enclosure aimed at making the place suitable as a residence, and the military character of the complex faded into the background.
Baena Castle is square and still has part of its original walls and three of the four towers located in those of: El Secreto, Los Cascabeles and the last one of the Cinco Esquinas or Las Arqueras.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.