The Commonwealth Sejm began meeting in Warsaw soon after the Union of Lublin and its rulers generally maintained their courts there, although coronations continued to take place in Kraków.
Realunionens sejm begyndte at mødes i Warszawa kort efter oprettelsen af Lublinunionen og regenterne holdt almideligvis deres hof der, selv om kroningerne fortsatte med at finde sted i Krakow.