Venosa Cathedral was constructed 1470 and 1502 by order of Duke Pirro del Balzo, who was responsible for the urban transformation of Venosa in the last decades of the 15th century. The upper part consists of two octagonal prisms, which form the base of the 10-metre high pyramidal spire. The lower part consists of three superimposed parallel epipeds, the first of which has a quadrangular base.
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.