St. Peter and St. Paul's Cathedral is the cathedral church of the Roman Catholic Apostolic Administration of Estonia. Catholicism was introduced to Estonia by force via the Northern crusades and dominated religious life during the Middle Ages. However, following the Reformation during the 16th century, Lutheranism took its place as the dominant faith, and during the time of Swedish rule in Estonia, Catholicism was banned.
Following Sweden's loss of Estonia to the Russian Empire during the Great Northern War, religious freedom was introduced by the new authorities. In 1799, the Catholic parish had grown large enough to be granted the former refectory of the long-since closed St. Catherine's Monastery as a place of worship on the site of the present church. In 1841, designs were made for a proper new church building for the site, which had grown too small. The architect was the well-known St. Petersburg architect Carlo Rossi. He designed a neo-Gothic basilica, without an apse, with a neo-classical exterior.
Between 1920 and 1924, the main, western façade received its present look, a work by architects Erich Jacoby and Franz de Vries somewhat deviating from Rossi's original façade. The interior of the church still reflects Rossi's design, however the wooden, neo-Gothic decoration has been removed. The cathedral has undergone a series of renovations, the latest in 2002–2003.
The cathedral incorporates several works of art, including works by local Baltic German artists Carl Sigismund Walther, Robert Salemann and a copy of a painting by Guido Reni.
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.