Altars come in various styles and designs. In catholic
churches they are always located at the front so that the priest can be clearly
seen as he celebrates the Mass. It is on the altar that the bread and wine are
offered by the priest and become the body and blood of the risen Jesus, for
this reason it is treated with the special respect and covered with a white
cloth.
Inside the altar there is usually a square flat stone and sealed
under this is a relic of one of the saints. This continues a tradition which
come from the very early times in the church's history when the community
gathered to celebrate the Mass (or Eucharist) either at the tombs of saints or
in the Catacombs.
When Mass is
celebrated there are usually two candles on the altar, and two cloths made of
white linen, a large cloth which covers the top of the altar (like a table
cloth) and a smaller cloth (called a corporal) in the middle where the bread
and wine are placed.