There was a special kind of music sung in some churches, the chant. A chant is simple, slow, and always religious. Usually, chants are sung "a cappella", which means without musical instruments. In medieval times within the monasteries these chants were developed into a new art form. They are named after Pope Gregory I who developed a system of musical notation that anyone could learn to read. He put many of these chants to his notation and circulated them to many different churches and monasteries.
