Mariamman Temple, Samayapuram
Arulmigu Sri Mariamman Temple, Samayapuram is an ancient Hindu temple in Tiruchirappalli district in Tamil Nadu, India. The main deity, Samayapuram Mariamman, a form of Adi Parashakti and Mariamman, is made of sand and clay with extractions of medicinal herbs unlike many of the traditional stone idols and is considered as most powerful Goddess, and hence unlike many other Hindu deities there are no abhishekams (sacred bathing) conducted to the main deity, but instead the "abishekam" is done to the small stone statue in front of it.
Source: Wikipedia — Mariamman Temple, Samayapuram (CC BY-SA 4.0)