In many Christian churches there is an altar lamp, also known as a chancel lamp, which is found in the chancel (sanctuary), either hanging or fixed. In Anglican, Old Catholic and Roman Catholic churches, the chancel lamp burns before a tabernacle or ambry to demonstrate the belief that Christ is present there through His Real Presence, as the Blessed Sacrament is reserved in these denominations. It is also found in the chancel of Lutheran and Methodist churches to indicate the presence of Christ in the sanctuary, as well as a belief in the Real Presence of Christ in the Eucharist. The sanctuary lamp may also be seen in Eastern Orthodox Churches. Other Christian denominations burn the lamp to show that the light of Christ always burns in a sin-darkened world.