The Pieterskerk (St. Peter's Church) is one of the oldest in Utrecht. Its construction began in 1039 and it was inaugurated on 1 May 1048 by Bernold, Bishop of Utrecht (although the lost west towers were probably only finished about a century after the inauguration). Characteristic of the Romanesque style in which it is built are the church's large nave pillars, each hewn from one piece of red sandstone, and the crypt under the choir. The building is now used by the Walloon Church.
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.