This picture of an otherwise copyrighted work may be distributed under the conditions of § 54 (1) Z. 5 of the Austrian copyright law which allows to reproduce, distribute, and publish architectural works of an actual building or other works of visual arts which were created to permanently remain at a public place.

Note: Due to the principle of Lex loci protectionis, this applies only to reuse of this picture in Austria. Reuse in other countries is subject to local law.

Further information can be found on Commons and in German Wikipedia.