The Nieszawa Statutes were a set of laws enacted in the Kingdom of Poland in 1454, in the town of Nieszawa located in north-central Poland. The King Casimir IV Jagiellon made a number of concessions to the Polish nobility and the gentry (szlachta) in exchange for their support in the Thirteen Years' War. Among other things, the Statutes required the King to seek the lords' approval when issuing new laws, when levying the mobilisation of armed forces, or when imposing new taxes. The Statutes strengthened the position of some of the nobility at the expense of less agreeable estates.