St. George's Cathedral, also called Wiener Neustadt Cathedral is the cathedral of the military ordinariate and a minor basilica. The church, begun in 1440 on the west side of the castle of Wiener Neustadt, was commissioned from the architect Peter von Pusica by Frederick IV, Duke of Austria. At the end of the work the church was dedicated to St. Mary and consecrated in 1460. In 1479 the Order of the Knights of St. George established their headquarters in Wiener Neustadt, and the patron of the church became St. George. After the abolition of this chivalric order in 1600, the church was entrusted first to the Cistercians and later the Piarists. In 1608 and 1616 two fires damaged the castle and the church, which were repaired by initiative of Maximilian III.
With the foundation of Teresian Military Academy on December 14, 1751, the church was closely tied to the fate of the castle as the headquarters of the military school. The castle and church were completely destroyed in bombing during the Second World War on March 12, 1945, but reconstruction began the following year, to be completed only in 1958.
Since 1963 the church has been home to the Military Ordinariate, as a result of which it was elevated to the status of cathedral. On 13 December 1967 it also became a minor basilica.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.