Mithraea were places of worship for the followers of the Roman mystery religion known as the Mithraic Mysteries .
The Duino Mithraeum is a Mithraeum located near Duino , in the province of Trieste , north - eastern Italy .
Mithraeum were places of worship for the followers of the Roman mystery religion known as the Mithraic Mysteries .
The Duino Mithraeum is a Mithraeum located near Duino , in the province of Trieste , north - eastern Italy .