To house the bells
Steeple is to church as tower is to castle.
The high tower a church is called a steeple.
Old Church Tower at Nuenen was created in 1885.
It was built as a church bell tower. It stands next to the church today.
Bible Tower, Thrissur
It is a square with a cross on top of it, a circlewith a cross on top of it is a church without a tower.
The tower is just part of a set of church buildings.
Yes it is the bell tower of the adjacent church.
to find your answer, see, "Who was the first person to jump out of a church tower with a parachute on?"
The church tower of Wilfridus
Steeple
a campanile