The Montalbano Elicona Castle is considered as one of the most beautiful monuments in Sicily. It was built in the 12th century by the Holy Roman Emperor, Frederick II on pre-existing byzantine and Arab walls. The intent of Frederick II was to provide Sicily a series of strong defensive buildings around the island. The well preserved extensive walls of the castle are easily seen throughout the town. From on top of the Valley the King could control the whole area and the nearby Nebrodi Mountains.
The small medieval winding roads lead up to this charming castle that was home to many kings and nobles like Luis King of Sicily and Frederick the Simple. The ongoing restoration work in progress closes up some areas of this site but it is still well worth a visit. Interesting are the rooms with armours on display and the small museum with musical instruments. The Royal Chapel of the Byzantine era is truly impressive! Apparently Arnaldo da Villanova was buried here, a famous character connected to this castle who died in 1313 in genoa and was a doctor, alchemist and a religious writer of great influence in the european courts.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.