I am just going to drop this here..
We shall go from the artisans at Udaipur to the Observatory at Jaipur:
https://en.m.wikipedia.org/wiki/Jantar_Mantar,_Jaipur
This was built in 1734 and it is as accurate as a modern atomic clock..this whole structure fascinates me.
Not to mention that ancient Hindus were the foremost engineers when it came to water management and using sacred geometry...their stepwells are a thing of functional beauty:
https://m.youtube.com/watch?v=PBH0zmLpKuI
Kindly let me know if you have problems opening THAT link.
The amount of scientific knowledge in the Hindu Shastras is incredible!
It is too bad that Hindus are not being taught this...they are taught stuff like the "Aryan Invasion Theory" instead and how India made nothing..no contribution to humanity whatsoever. It is a crying shame, but modern Hindus are buying it...not the traditional ones, like yours truly.