Complex sentence: Often hung in a church tower, such a set can include from three to sixteen bells (six-and eight-bell towers are particularly common), usually tuned to the notes of a diatonic scale (without intervening chromatic notes).
Split into simpler sentences: Often hung in a church tower, such a set can include from three to sixteen bells (six and eight bell towers are most common). They are tuned to the notes of a diatonic scale (without intervening chromatic notes).