English: Devanahalli Fort located 35 kilometers north of Bangalore city, at Devanahalli in the State of Karnataka, India was built by Chieftain Malla Byre Gowda of Avathi, a Vijayanagara empire vassal, in c. 1501.It was a mud fort then and in the late 18th century, Hyder Ali re-constructed the fort in stone as per current structure.