O ‧ ber ‧ am ‧ mer ‧ gau /ˌəʊbərˈæməɡaʊ $ -ˈæmər-/ BrE AmE
a town in Bavaria, southern Germany, known for the ↑ passion play (=a play telling the story of Jesus' suffering and death) performed by the people of the town every ten years since 1634, as a way of thanking God for saving them from the ↑ plague (=a very infectious disease that killed large numbers of people)