 Complete the following phrase:  The cornerstone of the school house was installed on 1 June 1914 according to the project of Georg Hellat. A year later the school building was complete, but the school was unable to move in due to the beginning of World War I. Instead of letting the school to move in, the authorities decided to place there the Austrian prisoners of war. In the year 1917 it was occupied by a military hospital. A year later the German military took possession of the building. Shortly after the 