Mirepoix Cathedral (Cathédrale Saint-Maurice de Mirepoix) foundation stone was laid by Jean de Lévis on the 6th May 1298. Construction continued, with interruptions, over the next six centuries. The cathedral was restored in 1858 and 1859. The cathedral has the second widest Gothic arch in Europe (after Girona in Catalonia, Spain).
Inside the cathedral vandalism and demolitions has destroyed many treasures but you can still admire a tabernacle, a Christ on the cross from the 14th century and seven paintings by Larivière-Vesontius.
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.