In the Book of Revelation, Seven trumpets are sounded, one at a time, to cue apocalyptic events received in the Revelation of Christ Jesus, by John of Patmos. The seven trumpets are sounded by seven angels and the events that follow are described in detail from Revelation Chapters 8 to 11. According to Revelation 8:1-2, the angels sound these trumpets after the breaking of the seventh seal. These seals secured the apocalyptic document, that was in the right hand of Him who sits on the main throne. The trumpets are referred to in Koine Greek as σάλπιγγος ; this was a straight, narrow bronze tube with a mouthpiece of bone and a bell; they do not resemble modern trumpets.