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:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.