 As a condition of his election, he was compelled to sign the "Pacta conventa" and the Henrician Articles, pledging religious tolerance in the Polish-Lithuanian Commonwealth.Henry chafed at the restrictions on monarchic power under the Polish-Lithuanian political system of "Golden Liberty".The Polish-Lithuanian parliament had been urged by Anna Jagiellon, the sister of the recently deceased king Sigismund II Augustus, to elect him based on the understanding that Henry would wed Anna afterward.