The very first elements used have been wood and terracotta, but architects little by little moved on to brick and stone, Specifically sandstone, granite, schist, and marble. No mortar was Utilized in the older temples and so exact slicing of dressed stones was necessary. Check out the Gaushala Seva initiative https://prnewsy.blogspot.com/2024/04/unveiling-majesty-of-hindu-temple-in.html