Piotr Myszkowski (c. 1510 – 1591) was a 16th-century Roman Catholic Bishop of Plock and Kraków, in Poland.
[1][2] Piotr Myszkowski was born about 1510 at Przeciszów into the Jastrzębiec noble family and studied at the Academy of Kraków from 1527.
He was a royal secretary and He was a signatory of the Act of Union of Lublin 1569.
[5] In 1575 he signed the election of the emperor Maximilian II of Habsburg.
[6] He died 5 April 1591 in Kraków and was buried in the chapel of St. Dominika przy kościele church, in the family vaults.