It is originally a Trinity Church, which was built in the 15th century as the church of the plague hospital.
The reason for this unique church building was to protect the population from the torments that existed in the past.
Especially in the Middle Ages, the population was plagued by hunger, war and the plague. Vows were made during these times of need. The citizens of Bruck built this chapel as a thank you and memorial for the population after the end of such plagues.
Services were celebrated in the church until 1783, after which the late Gothic central building was converted into a residential building in the 18th century.
The triangular construction makes the Holy Spirit Church unique in Europe. Inside there is a six-sided main room with a star rib vault. On the wall you can see a foundation inscription from the citizens of Bruck with a coat of arms - Pankraz Kornmeß, Michael Holzapfel, Leonhart Schierling and Albrecht Dyem.
The peculiarity of the chapel is that the triangular building has three portals and above them three windows of the same size and in the opposite corners there were also three altars. However, the upward orientation was reinforced by a steep roof with triangular roof surfaces, the dimensions of which corresponded to the floor plan. Such a church building does not exist anywhere in Europe.
On the initiative of the Harnoncourt family and with the support of the federal government, the state of Styria and the city of Bruck an der Mur, the unique chapel was extensively renovated.
Currently not open to the public!