Scicli was founded by the Sicels (whence probably the name) around 300 BCE. In 864 CE, Scicli was conquered by the Arabs, as part of the Muslim conquest of Sicily. Under their rule it flourished as an agricultural and trade center.
In 1091, it was conquered from the Arabs by the Normans, under Roger I of Hauteville, after a fierce battle. Following the various dynasties ruling the Kingdom of Sicily, it was an Aragonese-Spanish possession before being united in the Kingdom of Italy in the mid 19th century.
Following a catastrophic earthquake in 1693, much of the town was rebuilt in the Sicilian baroque style, which today gives the town the elegant appearance which draws many tourists to visit it. Alongside seven other cities in the Val di Noto, it has been listed as one of UNESCO's World Heritage Site in the list of Late Baroque Towns of the Val di Noto.
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.