A yantra (śrīcakra and Tripuracakra) used in the Tantric Śrī Vidyā worship of the goddess Tripurasundarī, where it represents both the goddess herself (in her supreme form) and the cosmos. A two- (sometimes three-) dimensional geometric figure, it is composed of five downward- and four upward-pointing intersecting triangles, representing, respectively, Śakti and Śiva, who emanate, like the cosmos, from the dot (bindu (4)) at the centre. The triangles are surrounded by two concentric circles of lotus petals, and the whole enclosed within a square broken by four apertures. Ritual worship of this figure, accompanied by recitation of the śrīvidyā mantra (the goddess in her subtle form), is thought to realize the deity and her power in the body of the initiate. The yantra has been installed in many South Indian Śākta temples, and now has wide popular currency.