The Dreiheiligen area was once the Kohlstatt, an industrial area with mills, forges, charcoal kilns, a brewery and a smelting works run by the sovereign prince. The imposing armory, built under Emperor Maximilian I as an arsenal, has remained almost unchanged. Today it is a museum with collections on the cultural history of Tyrol and has been the venue for the "Open Air Cinema" for many years.
Another architectural feature is the now secular Church of the Seven Chapels, which has its model in the Church of the Holy Sepulchre in Jerusalem. After a great plague epidemic in the 17th century, during which a lazaretto for plague patients was located in the then Kohlstatt, the Dreiheiligenkirche was built in honor of the three plague saints Sebastian, Pirmin and Rochus. It is from this church that the district got its present name.
Dreiheiligen developed into a popular residential district at the end of the 19th century, as evidenced by the many Gründerzeit houses. Many cultural businesses, such as the Kulturbäckerei Mölk, the Z6 and the much-visited Bogenmeile, are located there and further enliven the district.