The sanctuary is where the main church service is held
The central part of a church is called an altar. This is a sacred part of the church and the place from which the sermons are preached.
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Apse
for rhinoceros
The Nave is the middle part of the Church. This is where the congregation sits during the service, and is flanked by aisles on each side.
It isn't called anything. It is just called part of the nave.
a horse sancuary or a wild life reserve
A Christian! The Church is not the entire Church but simply an outshowing of the Body of Christ. It is simply that part of the Church in England, a Communion of believers.
When a priest speaks in Church as part of a Liturgy or Service, it is called a Sermon.
It was called the Eastern Orthodox, and the West part was called the Roman Catholic.
Sacristy.
The pointed part at top of church is called a steeple