1) Type of wall 
The bell gable (espadaña, espadanya, clocher-mur) is an architectural element crowning at the upper end of the wall of church buildings, usually in lieu of a church tower. It consists of a gable end in stone, with small hollow semi-circular arches where the church bells are placed. It is a characteristic example of the simplicity of romanesque ar...
See gable.
A bell-gable or bell-turret is a gable in which a bell or bells are suspended so that they may be rung. Bell-gables frequently occur in small churches and chapels that don't have a tower, being erected in the west end of the church. Sometimes the bell-gable contains one, sometimes two and occasionally three bells. Some bell-gables are thought to be...
[n] - an extension of a gable that serves as a bell cote
noun an extension of a gable that serves as a bell cote