I was at Maria Theresien Platz in order to visit the Museum of Art History (Kunsthistorisches Museum Wien). The museum was built in 1872 in the Italian Renaissance style.
I walked into the museum when it opened at 10 and did not leave until 4:30 because it houses one of the richest and most important picture galleries in the world. The Hapsburg emperors had a passion for acquiring art and Archduke Leopold Wilhelm augmented the collection with many paintings by Pieter Bruegel the Elder. In addition to the painting gallery there is a great collection of Egyptian and Classical art.
When I left the museum I took the underground to Karlplatz to see Karlskirche built in honor of Saint Charles Borromeo.
The facade is novel with the two huge freestanding columns. I read in a guidebook that the idea came to the architect Von Erlach when he was in Rome and saw Saint Peter and Trajan’s column fused together as one from the Pincio hill at sunset.