The ringed cross is a class of Christian cross symbols featuring a ring or nimbus. The concept exists in many variants and dates to early in the history of Christianity. One variant, the cruciform halo, is a special type of halo placed behind the head of Jesus in Christian art. Other common variants include the Celtic cross, used in the stone high crosses of France, Ireland and Britain; some forms of the Coptic cross; and ringed crosses from Galicia.