Schloss Traunsee, Historical castle in Altmünster, Austria.

Schloss Traunsee sits on the shore of Lake Traunsee with corner towers, steep pitched roofs, and a polygonal tower topped with a spire and lantern. The building now serves as a school and offers its decorated halls for events and celebrations.

Duke Philipp of Württemberg had Schloss Traunsee built from 1872 to 1875 as a summer villa for his wife, Archduchess Maria Theresia, a granddaughter of Archduke Karl who won the 1809 Battle of Aspern. The couple used it for summer stays until 1905. After Philipp's death in 1917 it passed to Duchess Marie Therese, and in 1927 it was sold to their sons Robert and Ulrich. In 1969 the castle and park became property of the Republic of Austria.

The chapel displays French Renaissance style and was designed by Heinrich von Ferstel. This architectural approach shaped how noble residences looked in Austria during that era.

The castle now serves as a school, so the interior is generally not open to regular visitors. Its decorated halls can be rented for private events like weddings and hold about 120 guests.

Inside is a ballroom with Italian silk wallpaper that shows the luxury of that era. There is also a marble terrace and a glass-roofed atrium used for celebrations.