The Herz-Jesu-Kirche is the largest church in Graz. It was designed down to the last detail by architect Georg Hauberrisser and constructed from 1881 to 1887.
The church was designed in the Neogothic style, with a large, high nave and under-church. The tower is 109.6 meters tall, making it the third-highest church tower in Austria. Of special note are the stained glass windows, which are among the few extant examples in Austria of Neogothic stained glass.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.