Final answer:
The purpose of the Castle when Curwood built it is not explicitly mentioned, but it may have been used for religious purposes, as a military fortification, or as a palace.
Step-by-step explanation:
The purpose of the Castle when Curwood built it is not explicitly mentioned in the given information. However, it is mentioned that some scholars believe it may have been used for religious purposes, while others suggest it was a military fortification or a palace. The construction of the Castle using drystone technology is considered to be deceptively simple, but it has stood for hundreds of years.
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