Nalayira Divya Prabandham is a collection of 4,000 Tamil verses sung vy 12 Alvar saints and compiled by Nathamuni during the 9th – 10th centuries. They are in praise of Narayana (Vishnu) and his many forms, sung by Alvars at sacred shrines called Divya Desams. Nalayira Divya Prabandham was described as the Tamil Veda, claimed the text was as important as the four Vedas.
After the death of Achyuta Deva Raya, the succession was disputed. His son, Venkata I also called as Venkata Raya or Venkatadri Raya, succeeded him, but he was a weak ruler and was killed six months later.
Under the rule of the Vijayanagar empire, irrigation became prominent. The development of irrigation took place mainly during the rule of Deva Raya I. New tanks were built and dams were constructed across the river Tungabhadra.
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