The Deccan is the plateau of peninsular India, and its religious interest lies in being a meeting ground rather than a heartland. Sanskritic tradition from the north, Tamil devotional religion from the south, and Persianate Islam arriving with the Delhi Sultanate's expansion all established themselves on the same plateau and had to deal with one another.
Its rock-cut sites show the first of these encounters. At Ellora, Buddhist, Hindu and Jain excavations stand along one escarpment, in that rough chronological order, so a visitor can walk from a Buddhist prayer hall to a Shaiva monolith to a Jain shrine in an afternoon. That sequence is evidence for how patronage moved between traditions in the same territory over several centuries.
The second encounter produced the Deccan sultanates, five successor states to the Bahmani kingdom, whose courts at Bijapur, Golconda and elsewhere developed a distinct Indo-Persian culture with strong Shia connections to Iran, substantial Hindu participation in administration, and a vernacular literature in Dakhni. Sufi orders spread widely across the plateau, and the shrines of their figures, at Gulbarga and Khuldabad among many, remain active and draw visitors of more than one religion.
Vijayanagara, on the plateau's southern edge, held out as a large Hindu state through the same period and defined itself partly against its northern neighbours.