Atheist "church" in London.

[Aractus]

It's a computer according to Wikipedia anyway. Probably because was used for astrological calculations rather than just telling the time.

No it isn't. It isn't used for any calculations, it cannot perform them, it's only a mechanical calendar.

It's still advanced for 200 BC or whenever it was, nothing like that would be built again until the after the Renaissance 1800 years later.

c. 100BC. But no, it wasn't "advanced". It was one of the most advanced things they had, but it would have been based off the mechanics of the Archimedes odometer. And I really doubt that we found the "only one" ever built, I believe there would have been more. The "Byzantine Sundial Calendar" c. late 600's AD/early 700's AD. It uses the same types of gears as the AM (although not as many). So your argument that the technology wasn't seen for 1800 years is incorrect, we know that the technology was used at least from the time of Archimedes to the time the Byzantine Sundial Calendar was made (2nd century BC-5th century AD).

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Excavations at Harappa and Mohenjo-Daro (in India today) found radioactive skeletons from 2500 BC. Not only is that the carbon date, that's the believed contemporary date of the city. The cities were wiped out entirely. Buildings were destroyed, foundations were found fused together by intense heat. Some believe the site is not 4,500 years old, but 8,000-12,000 years old (carbon dating isn't as accurate for radioactive material). Some archologists believe that this, and other examples is undeniable evidence of ancient atomic blasts.