Mausoleum of Yugoslav Soldiers in Olomouc
The Mausoleum of Yugoslav Soldiers (Czech: Mauzoleum jugoslávských vojínů or also Jihoslovanské mauzoleum) is a neoclassical chapel with an ossuary containing remains of soldiers from what later became Yugoslavia killed in the First World War. It was built in 1926 in Bezruč Park in Olomouc, Czechoslovakia (now the Czech Republic) by the Czechoslovak-Yugoslav League.
Source: Wikipedia — Mausoleum of Yugoslav Soldiers in Olomouc (CC BY-SA 4.0)