While traditional carillons have at least 23 bells, we will accept those with as few as 15 bells. They can be played both manually and by automation. Not all bell towers are considered carillons, so be sure to verify there are at least 15 bells. You need to make this clear, either with pictures or by a link to a website with a description of the carillon. If not, don't bother submitting it.
According to the linked Wiki article:
A carillon is a musical instrument consisting of at least 23 cast bronze cup-shaped bells which are played one after the other (to play a melody) or sounded together (to play a chord). A carillon is played by striking a keyboard (called a "baton") with the fists and by pressing the keys of a pedal keyboard with the feet. The keys mechanically activate levers and wires that connect to the metal clappers that strike the bells, allowing the performer (known as a "carillonneur") to vary the intensity of the note according to the force applied to the key.
Wiki
Here are some interesting web pages that include additional information, including lists of locations.
World Carillon Federation
GCNA
Utube
Utube2