March 12, 1434
Establishment of the Ruthenian Voivodeship
On March 12, 1434, King Władysław Jagiełło established the Ruthenian Voivodeship as a new administrative unit of the Kingdom of Poland. The voivodeship was created on the territories of the former Principality of Galicia-Volhynia and encompassed five lands with its capital in Lviv.
