Arechi Castle is a castle in southern Italy located on top of a mountain, at the foot of which lies the city of Salerno.
The construction of the castle began in the 6th century under the Byzantine rule (the construction of the oldest part of the ramparts made of sandstone blocks is characteristic of this period).
Salerno was part of the Duchy of Benevento, which was the southernmost part of the Kingdom of the Lombards. When Charlemagne attacked the Lombards in the year 774, the Duchy of Benevento was ruled by Arechi II. He moved the main centre of power from Benevento to Salerno in order to strengthen his control over strategic areas such as the coastline and to secure communications within the province of Campania. During this period the castle was heavily fortified and its ramparts took the shape that have survived to our times.
Over the centuries, the castle had many owners. Archaeological work has identified, among other things, traces of the Norman presence. A watchtower was built north of the castle, allowing to conduct observations of the Gulf of Salerno.
Currently, the castle has been bought from the commune by a private company that arranged a restaurant inside. The defensive walls, however, are open to visitors free of charge, there is also a museum in the castle (large collections of coins and medieval ceramics were found during the renovation). At night, perfectly lit, it is visible from almost anywhere in Salerno.
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.