Mysore/Mysuru: In a latest discovery, the Department of Archaeology, Museums and Heritage, has unearthed three ‘Veeragallu’ (Hero Stones) that  date back to the 15th century Vijayanagar empire. The Department  had taken up a cleaning drive near Mahalingeshwara Temple at B.M. Shri Nagar in Metagalli, when one Hero Stone was found beneath the earth and two…