The Jajce Mithraeum is a Roman-era temple dedicated to the god Mithra, originating in the 2nd century AD with repairs in the early 4th century. Rediscovered in 1931, the underground spelaea was carved into the earth to simulate a cave, as Mithraic worship required. Archaeologists found a relief depicting Mithra slaying a bull, silver ornaments, and sixteen coins from the 4th century. Declared a National Monument of Bosnia and Herzegovina, it is one of the best-preserved Mithraea in Europe and part of the Jajce ensemble on the UNESCO Tentative List.
Jajce Mithraeum

| Type | Temple complex |
|---|---|
| Period | 1 - 500 AD |
| Country | Bosnia and Herzegovina |
| Coordinates | 44.3408° N, 17.2661° E |
Bosnia and Herzegovina