Hindu monuments probably existed then, but they have got not survived, Maybe as they were not built of stone. A handful of images of recognizable Hindu deities and votive pillars have survived from about 100 bce to two hundred ce. Hindu temple design commenced in earnest within the 5th century https://hanumanmandiradelaide.com.au/shani-dev-temple-in-adelaide-a-sanctuary-of-faith-and-divine-blessings/