Serapis figured among the international deities whose cult was received and disseminated throughout the Roman Empire, with Anubis sometimes identified with Cerberus. At Rome, Serapis was worshiped in the Iseum Campense, the sanctuary of Isis built during the Second Triumvirate in the Campus Martius. The Roman cults of Isis and Serapis gained in popularity late in the 1st century when Vespasian experienced events he attributed to their miraculous agency while he was in Alexandria, where he stayed before returning to Rome as emperor in 70. From the Flavian Dynasty on, Serapis was one of the deities who might appear on imperial coinage with the reigning emperor.