Interesting thing about this is that we don't truly know the origins of the Tower. It would seem, based off its location, that it would have been an agricultural building (storage wind power, etc), but nobody knows and there was not thorough documentation of it existing throughout the town's history. it would also be unusual that a utilitarian building would have markings to denote solstice, equinox, etc.

Despite all our technology, we still can't figure it's origins out. the fact it uses relatively primitive construction methods, doesn't necessarily mean it's more than several hundred years old.

sometimes that's the intriguing aspect of a relatively simple structure like this, we may never really know it's true origins or design intent.

Let's just enjoy it for what it is.