Crosses on the walls of a catholic

Roman Catholic Church

The Catholic Church, also known as the Roman Catholic Church, is the world's largest Christian church, with over a billion members. Led by the Pope, it defines its mission as spreading the gospel of Jesus Christ, administering the sacraments and exercising charity...

 church or cathedral

Cathedral

A cathedral is a Christian church that contains the seat of a bishop...

 showing where the catholic bishop has anointed the church with chrism

Chrism

Chrism , also called "Myrrh" , Holy anointing oil, or "Consecrated Oil", is a consecrated oil used in the Roman Catholic, Eastern Orthodox, Eastern Rite Catholic, Oriental Orthodox, in the Assyrian Church of the East, and in Old-Catholic churches, as well as Anglican churches in the administration...

 oil in order to consecrate it "for the Glory of God". There is usually a place for a candle

Candle

A candle is a solid block or cylinder of wax with an embedded wick, which is lit to provide light, and sometimes heat.Today, most candles are made from paraffin. Candles can also be made from beeswax, soy, other plant waxes, and tallow...

 in front of each cross which is lit on the anniversary of the consecration

Consecration

Consecration is the solemn dedication to a special purpose or service, usually religious. The word "consecration" literally means "to associate with the sacred". Persons, places, or things can be consecrated, and the term is used in various ways by different groups...

. The crosses are considered an important sign of the sacredness of the church.