Mahamantri Timmarusu / Appaji's prison (Jail) during 16th century in penukonda.

Saluva Timmarusu or Saluva Nayaka or simply Timmarasu was the Prime Minister (Mahapradhana) of Krishna Deva Raya. He is also known as "Appaji". He had also served as Prime Minister under Viranarasimha Raya and Tuluva Narasa Nayaka. He belonged to a Telugu Niyogi Brahmin family. Timmarusu was born on 1451 in Machilipatnam. Timmarasu was responsible for the coronation of Krishnadevaraya.
In 1524, Krishnadevaraya crowned his minor son Yuvaraja. A few months later the prince took ill and died of poisoning. Accusing Timmarusu for this crime, Krishnadevaraya had minister and his son Prisoned and Blinded. It is said the King later released Timmarusu, on knowing that the conspiracy to kill his own son was hatched by Gajapatis of Odisha.