The Epigraphy Branch of the Archaeological Survey of India (ASI) documented and copied 25 ancient inscriptions in the Nallamala Tiger Reserve, spread across Andhra Pradesh and Telangana.
The inscriptions date from the 2nd century CE to the 16th century CE, covering nearly 1,400 years of history.
The inscriptions are written in Telugu, Kannada, Prakrit, and Brahmi script.
The records are linked to the Satavahana, Eastern Chalukya, Kalyani Chalukya, Potapi Chola, Kakatiya, Reddy, and Vijayanagara periods.
Ancient megalithic and early historic rock art, preliminarily dated to about 1500 BCE, was also discovered near Alatam on the banks of the Krishna River.