San Nicolás church stands in the suburb of the same name outside the walls, a medieval quarter inhabited by Christians and dedicated to agriculture and sheep farming. It also had a large number of Mudejar residents. It was built in Caleno granite in the late-Romanesque style of Ávila between the second half of the 12th century and the beginning of the 13th. The upper end and porches remain from the original construction.
The three entrances take the form of semi-circular arches with archivolts. The northern entrance is the most ornamental and is decorated with wedges, palmettes and ivy leaves, which are very typical motifs on Romanesque churches in Zamora. The capitals of the archivolts have plant motifs.
The tower is built on to the upper end from the North. It is divided into three bodies and shows two periods of construction. A Vetton animal sculpture was reused for the plinth.
It has three naves: the central nave opens into a large apse and the side naves into rectangular chapels. Except for the upper end, the temple was covered with Baroque-style plasterwork in the 17th century.
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.