It is the 5th by way of 7th century CE when outer structure and appearances of Hindu temples in north India and south India started to broadly diverge. It is probably the oldest temples in Jamnagar and 1000s of devotees check out every year to hunt blessings of Lord Hanuman. https://hanumanmandirsouthaustralia.travel.blog/2025/01/23/the-importance-of-hindu-temples-in-preserving-faith-and-culture/