On the war against Muscovy. Sejm in Piotrków 1514.
The sejm was convened most probably at the beginning of 1514. The pre-sejm sejmiks were held in March of 1514. The sejm began proceedings on 26 March, which lasted only till 4 April 1514. The proceedings took place in the king Sigismund’s absence, who - because of the war against Muscovy - resided in the Grand Duchy of Lithuania. The king’s writs to sejm were brought by the Vice-Chancellor, Krzysztof Szydłowiecki. During the sejm sessions, the deputies adopted a law on defending the state, which - due to the war being waged - came into force immediately, as the king empowered the Vice-Chancellor K. Szydłowiecki to authorize it on his behalf.
See: Z. Wojciechowski, Zygmunt Stary [Sigismund I the Old], Warszawa 1946. W. Uruszczak, Sejm walny koronny w latach 1506-1540 [Crown Great Sejm in 1506 - 1540], Warszawa 1980. Ustawodawstwo zob. Volumina Constitutionum, T. 1, cz. 1, Design and layout prepared by S. Grodziski, Irena Dwornicka, W. Uruszczak, Warszawa 1996, s. 279-282.