The original church was erected in 1150 over a roman temple build in honor of the goddess Cybele, the mother-God. Three times destroyed, three times has been rebuilt.
In 1363, a fire completely destroyed the church. In 1600 it was partially destroyed in a cyclone before succumbing to the earthquake in 1755. Queen Maria I of Portugal, in 1783 ordered to rebuild the church again.
The Vestibule of this church, in manueline style is considered one of the workmanships of its time.
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.