The Metropolitan Cathedral of Saints Vitus, Wenceslaus and Adalbert (Czech: metropolitní katedrála svatého Víta, Václava a Vojtěcha) is a Roman Catholic metropolitan cathedral in Prague, the seat of the Archbishop of Prague. Until 1997, the cathedral was dedicated only to Saint Vitus, and is still commonly named only as St. Vitus Cathedral.

This cathedral is a prominent example of Gothic architecture and is the largest and most important church in the country. Located within Prague Castle and containing the tombs of many Bohemian kings and Holy Roman Emperors, the cathedral is under the ownership of the Czech government as part of the Prague Castle complex.[1] Cathedral dimensions are 124 by 60 metres (407 ft × 197 ft), the main tower is 102.8 metres (337 ft) high, front towers 82 metres (269 ft), arch height 33.2 metres (109 ft). The current cathedral is the third of a series of religious buildings at the site, all dedicated to St. Vitus. The first church was an early Romanesque rotunda founded by Wenceslaus I, Duke of Bohemia in 930. This patron saint was chosen because Wenceslaus had acquired a holy relic – the arm of St. Vitus – from Emperor Henry I. It is also possible that Wenceslaus, wanting to convert his subjects to Christianity more easily, chose a saint whose name (Svatý Vít in Czech) sounds very much like the name of Slavic solar deity Svantevit.[citation needed] Two religious populations, the increasing Christian and decreasing pagan community, lived simultaneously in Prague castle at least until the 11th century.

In the year 1060, as the bishopric of Prague was founded, prince Spytihněv II embarked on building a more spacious church, as it became clear the existing rotunda was too small to accommodate the faithful. A much larger and more representative Romanesque basilica was built in its spot. Though still not completely reconstructed, most experts agree it was a triple-aisled basilica with two choirs and a pair of towers connected to the western transept. The design of the cathedral nods to Romanesque architecture of the Holy Roman Empire, most notably to the abbey church in Hildesheim and the Speyer Cathedral. The southern apse of the rotunda was incorporated into the eastern transept of the new church because it housed the tomb of St. Wenceslaus, who had by now become the patron saint of the Czech princes. A bishop's mansion was also built south of the new church, and was considerably enlarged and extended in the mid 12th-century.The St. Vitus Cathedral has two organ casings. The upper façade belonged to a baroque organ, which was built in 1765 by Anton Gartner. It had 40 stops on 3 manuals and pedals. This case is purely decorative. The associated work was transported around 1909 and was lost.

The lower neoclassical casing contains today's main organ. It was built by Josef Melzel in the years 1929-31. A general overhaul was carried out by the organ builder Brachtl a Kánský (1999-2001).[4] The rather modest instrument in relation to the large church space has 58 stops on 3 manuals and pedals, 4,475 pipes in total. The action is purely pneumatic. With a large number of basic pipes (flutes and principals) and little reeds (trumpets), the instrument has a rather gentle tone - a typical feature of post-Romantic organs.