AMSTERDAM (AP) — A Dutch historical museum got more than the bronze swords, golden helmets and precious gems it bargained for when it organized an exhibition on ancient treasures from Ukraine: it also inherited a diplomatic mess.

Russia annexed the Crimean Peninsula a month after the Allard Pierson museum opened the “Crimea — Gold and secrets of the Black Sea” exhibition in February. Curators say now they are not sure where to return the objects on display when it ends in August.