The Epigraphy Branch of the Archaeological Survey of India (ASI) documented and copied 25 ancient inscriptions in the Nallamala Tiger Reserve, which spreads across Andhra Pradesh and Telangana. Dating from the 2nd to the 16th century CE, they cover about 1,400 years and are written in Telugu, Kannada, Prakrit and Brahmi script. They relate to the Satavahana, Eastern Chalukya, Kalyani Chalukya, Potapi Chola, Kakatiya, Reddy and Vijayanagara periods. Megalithic rock art of about 1500 BCE was also found near Alatam on the Krishna.