In Revelation 2 we see Jesus talking to the 7 different churches. 7 is the number of wholeness. Letters are penned to the churches in Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea. Each letter was specifically written to each church and contained praise and rebuke. These messages in the letters are themes that are relevant to our churches today.