I saw this very popular video a few days ago: Hoysaleswara Temple, India - Built with Ancient Machining Technology?
Here is a related article.
It claims the following
If you look closely, you can see these minute circular marks all around the pillar. These are created as a result of machining the pillar on a lathe, this process is called turning. There is no way to achieve this with chisels and hammers manually. If you look at these pillars, it is crystal clear that they were made with machines. In fact, archeologists agree that these pillars were created in a lathe, but offer no convincing explanation as to how these huge pillars were machined, 900 years ago. Nowadays, we are able to create these fascinating grooves and designs on a lathe, but machining a 12 foot tall stone pillar would be a very difficult job, even today. So, how were these pillars created with amazing perfection in ancient times? Did ancient builders use machines and advanced tools, just like what we use today? If this is true, is it possible that they also carved these machines or tools in this temple?
Were these pillars built using lathe?