Treaty of Buda
... that the Treaty of Buda enabled Louis I of Hungary to become king of Poland because his uncle had no legitimate sons, but had to be followed by the Treaty of Košice because Louis himself had no sons?
... that the <b id="mwD9A"><a href="./Privilege_of_Buda" id="mwD9E" rel="mw:WikiLink" title="Privilege of Buda">Treaty of Buda</a></b> enabled <a href="./Louis_I_of_Hungary" id="mwD9I" rel="mw:WikiLink" title="Louis I of Hungary">Louis I of Hungary</a> to become king of Poland because <a href="./Casimir_III_the_Great" id="mwD9M" rel="mw:WikiLink" title="Casimir III the Great">his uncle</a> had no legitimate sons, but had to be followed by the <a href="./Privilege_of_Koszyce" id="mwD9Q" rel="mw:WikiLink" title="Privilege of Koszyce">Treaty of Košice</a> because Louis himself had no sons?