Sidney
Dedicated to different functions
They began to build this castle in the 10th century and over the centuries it has been dedicated to different functions. It was originally a mosque, going on to become a Christian tempo, sanctuary and even local municipality. It's rectangular and has 8 towers. The predominant style is Gothic. It was named a National Monument and is perfectly preserved. You can visit although it's privately owned. Very easy to get to, as it is in the heart of the town.
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