Zamość Synagogue is a UNESCO-protected Renaissance synagogue built between 1610 and 1618. Erected during the times of the Polish–Lithuanian Commonwealth, it functioned as a place of worship for Polish Jews until World War II, when the Nazis turned the interior into a carpenters' workshop. The structure was spared from destruction and in 1992 it became a UNESCO World Heritage Site alongside the Old City of Zamość.
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.