[Pramāṇa](https://indike.org/pramana/) › [Physical](https://indike.org/pramana/inp) › [Artefacts](https://indike.org/pramana/inp.artefact) › [The British Museum, London](https://indike.org/pramana/inp.artefact.bm) › Yantra # Yantra 'Yantra' or metal plaque covered with 'mantras' and used in the worship of the goddess. In form of expanded lotus, there are inscriptions on the petals and symbols in centre. Made of bronze. - **Kind:** artefact - **Date:** 1700–1799 CE --- Source: [https://indike.org/pramana/inp.artefact.bm.1940-0716-329](https://indike.org/pramana/inp.artefact.bm.1940-0716-329) · Pramāṇa