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The vestibule is the entrance to the church. This area is to help elevate the mind before entering the main church. The baptistry is usually placed near the entrance to the church,symbolizing the purpose of the ceremony, which is to admit the person into full membership in the congregation.
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This is the area where the worshipers sit in the pews. It may be ringed by displays of the Stations of the Cross. It may also have confessional booths along the sides.
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The chancel contains the lectern, the priest's seat and prayer stall and the pulpit. The chancel also contains the choir area. Transepts are areas that project out of the chancel on either side so that the floor area of the church resembles a cross. They may contain chapels or statuary.
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The sanctuary contains the altar, usually on an elevation to the rest of the church. Behind the sanctuary may be a semicircular area holding a chapel. This is known as an apse.
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The sacristy is a side room holding the tools, books and vestments needed by priests. There is usually a small chapel and altar. A sink, the sacrarium, drains directly into the earth and is used to wash the priests' hands.
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Found in larger churches, like cathedrals, the outer area in the church around the rear of the presbytery is the ambulatory and is usually ringed with side altars.











