The Austrian War Museum, or Heeresgeschichtliches Museum in German, displays articles relating to the Austrian military going back hundreds of years.
The museum itself was built in a range of styles including Byzantine, Hispano-Moorish and Neo-Gothic, making the building itself interesting from an architectural point of view. The museum opened in 1856 and is now open every day of the week for public viewing.
It is split into five different sections, each showing a different part of Austrian history. There are exhibits on the Thirty Years war, the wars against the Turkish Ottoman Empire, the French Wars and the first and second World Wars.
One of the most popular exhibits revolves around the assassination of Franz Ferdinand in 1914, which sparked the First World War. The exhibit contains the car in which the royals were shot and various other original artifacts from the time.
Another interesting display is that of the Austrian Navy. Being a landlocked country, most people would not think of Austria as having a large naval presence, but this exhibit proves otherwise.
The Jesuit Church (German: Jesuitenkirche), also known as the University Church (German: Universitätskirche) is a two-floor, double-tower church influenced by early Baroque principles but remodeled by Andrea Pozzo in 1703-1705. The Church is located in Vienna, Austria on Dr. Ignaz Seipel-Platz, immediately adjacent to the old University of Vienna buildings.
The Jesuitenkirche was built between 1623 and 1627 on the site of an earlier chapel, at the time when the Jesuits merged their own college with the University of Vienna's philosophy and theology faculty. The Emperor broke ground for both college and church, with the church itself dedicated to Saints Ignatius Loyola and Francis Xavier.
In 1703, Brother Andrea Pozzo, s.j. an architect, painter and sculptor and a master in the quadratura, was invited by the emperor Leopold I to redecorate the church. He added twin towers and reworked the facade 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. The church was then rededicated to the Assumption of Mary.
I didn't know much about Austria's history regarding wars but it would be interesting walking through the aisles of that museum and get to know more of it, plus the building itself is really nice!, as well as the church on your second post.