Digne Cathedral construction began in 1490 by the order of the then bishop Antoine de Guiramand to cater for the movement of the town's population to a higher, more secure and defensible location round the local castle. The cathedral was renovated and expanded in the 1860s under the direction of architect Antoine-Nicolas Bailly.
The previous cathedral in the old town, Notre-Dame-du-Bourg (Cathédrale Notre-Dame-du-Bourg de Digne), a late Romanesque building of the 13th century, still stands as a museum.
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.