This 13th century citadel is octagonal in shape, with each of the eight corners sporting an octagonal tower.

Its geometric design was very unique at that time.

The castle was built in 1240 by the Holy Roman Emperor Frederick II, but nobody knows why.

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Some believe that Castel del Monte was nothing more than a hunting lodge.

Photo credit:Batmagazine

When it was built, the castle was not as isolated as it appears today.

The region was famously fertile with a plentiful supply of water and lush vegetation.

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There is only one document from Frederick IIs era which speaks of Castel del Montes construction.

The nature of the work was not clear.

Also, there is no document that mentions Frederick II ever using the castle.

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Eventually, it became a refuge during a plague.

The castles unique octagonal shape has been a subject of debate among scholars.

Frederick II was responsible for the construction of many castles in Apulia.

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None, aside from Castel del Monte, has the octagonal shape.

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