Castellaneta Cathedral is dedicated to the Assumption of the Virgin Mary. It is the episcopal seat of the Diocese of Castellaneta. The first cathedral on the site was initially dedicated to Saint Nicholas of Bari, and dated at the latest from the Norman occupation of the last decades of the 11th century. In the 14th century, it was replaced with a Romanesque structure with a basilica layout of a central nave and two aisles separated by columns, all three terminating in semicircular apses. The dedication was changed at this time to the Assumption of the Virgin Mary.
Three chapels were later added: the Chapel of the Most Holy Sacrament (Santissimo Sacramento) in 1538 and the Chapel of Mary the Consoler (Santa Maria Consolatrice) in 1643, both founded by confraternities; and the Chapel of the Most Holy Crucifix (Santissimo Crocifisso). There is also a chapel dedicated to Saint Nicholas, with Romanesque capitals. In 1771, a new white limestone façade was added. Today, the bell-tower retains some of the Romanesque-Gothic elements. In the 18th century, new polychrome altars were built. The Bishop's Palace is adjacent.
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.