section_path: Practices/Symbols
section_name: Symbols
paragraph_text: Symbols
  
  Most Christian denominations have not generally practiced aniconism, the avoidance or prohibition of devotional images, even if early Jewish Christians, invoking the Decalogue's prohibition of idolatry, avoided figures in their symbols.
  
  The cross, today one of the most widely recognized symbols, was used by Christians from the earliest times. Tertullian, in his book De Corona, tells how it was already a tradition for Christians to trace the sign of the cross on their foreheads. Although the cross was known to the early Christians, the crucifix did not appear in use until the 5th century.
  
  Among the earliest Christian symbols, that of the fish or Ichthys seems to have ranked first in importance, as seen on monumental sources such as tombs from the first decades of the 2nd century. Its popularity seemingly arose from the Greek word ichthys (fish) forming an acrostic for the Greek phrase Iesous Christos Theou Yios Soter (Ἰησοῦς Χριστός, Θεοῦ Υἱός, Σωτήρ), (Jesus Christ, Son of God, Savior), a concise summary of Christian faith.
  
  Other major Christian symbols include the chi-rho monogram, the dove and olive branch (symbolic of the Holy Spirit), the sacrificial lamb (representing Christ's sacrifice), the vine (symbolizing the connection of the Christian with Christ) and many others. These all derive from passages of the New Testament.
  
  A few sources indicate that Christians even used an eight-spoked wheel to symbolize the five Greek letters being placed on top of each other, dating back to the time of the Roman Empire.