The Great Altar of Pergamon is in the Pergamon Museum, Berlin. The base of this altar remains on the upper part of the Acropolis. It was perhaps this altar, believed to be dedicated to Zeus, that John of Patmos referred to as "Satan's Throne" in his Book of Revelation (Revelation 2:13).Pergamum proudly dedicated temples to three emperors, making the city "temple warden" of the emperor cult three times. The honor of erecting the first temple in Asia to an emperor (Augustus in 29 BC) went to Pergamum. Later came a temple to Trajan (r. 98-117 AD), built by his successor Hadrian. Both emperors were worshiped there. Here, partial reconstruction of the Trajan Temple on the Pergamum acropolis.