Romualdo Cave

Romuald’s Cave is a cave in the western part of Istria County, Croatia, that contains the oldest known cave paintings in southeast Europe, as well as traces of both animal and human Upper Paleolithic habitation. Although the cave has been excavated since late 19th century, the paintings were only found in 2010, by Professor Darko Komšo, while the findings were published in Antiquity in 2019.

Source: Wikipedia