Hindu monuments likely existed then, but they may have not survived, Probably because they weren't constructed of stone. A handful of illustrations or photos of recognizable Hindu deities and votive pillars have survived from about 100 bce to two hundred ce. Hindu temple design started in earnest from the 5th https://hanumanmandiradelaide.com.au/hanuman-mandir-adelaide-a-spiritual-sanctuary-in-south-australia/