This is a wheel engraved in the 13th century built Konark Sun Temple in Orissa, India. The temple is designed as a chariot consisting of 24 such wheels. Each wheel has a diameter of 9 feet 9 inches with 8 spokes. Each wheel acts as a sun dial and the various engravings shows the daily activity of people at different hours of the day. This is a UNESCO World Heritage site.
Subhrajyoti, thanks for the image and lesson