Henrician Articles
The Henrician Articles or King Henry's Articles (Polish: Artykuły henrykowskie; Lithuanian: Henriko artikulai; Latin: Articuli Henriciani) were a constitution in the form of a permanent agreement made in 1573 between the "Polish nation" (the szlachta, or nobility, of the Polish–Lithuanian Commonwealth) and a newly-elected Polish king and Lithuanian grand duke upon his election to the throne. The Articles were the primary constitutional law of the Polish–Lithuanian Commonwealth.