A cross with four arms of equal length (crux quadrata) is known as a Greek cross. It is symbolic of the Church itself rather than Christ’s crucifixion. In non-traditional religions it represents the four elements: earth, air, fire and water.
CROSS FIVE FOLD
Although a Greek cross does not represent the crucifixion, when five Greek crosses are displayed together, they symbolize the five wounds inflicted on Christ: nails in the hands and feet and a spear in his side. This cross was popular in the Crusader era.
CROSS WITH THORNS
A circle superimposed on a Greek cross is representative of the crown of thorns placed on Christ’s head during the crucifixion.