In 1703, Brother Andrea Pozzo, S.J., an architect, painter, and sculptor, and a master in the quadratura, was requested by Emperor Leopold I to redecorate the church.

He added twin towers and reworked the façade in an early Baroque style with narrow horizontal and vertical sections.

The design of the windows, narrow niches (with statues), and the small central part of the façade deviate from the Baroque style of the towers.

Despite its relatively austere exterior, the interior is remarkably opulent with ersatz marble pillars, gilding and a number of allegorical ceiling frescoes.

Immediately adjacent is the Aula (great hall) of the Vienna's university, where Beethoven's Seventh Symphony had its premiere.