One of my favorite types of sacred music is the music of the Russian Orthodox church. It has its origins in Byzantine chant, but developed its own distinct style called Znamenny Chant. It is sung in Old Slavonic, so I cannot understand it with the exception of a word here or there that is similar in modern Russian, but I find it incredibly beautiful. Sung in resonant sacred spaces as part of worship services, you hear the devotion in the music. Not only are the sounds and attitudes of the singers imbued with beauty, the music is part of a rich symbolism, together with candles and incense, that help the worshipper to look upward to the divine. Other religious traditions have similarly beautiful elements involving music. For example, a muezzin calls out the adhan, or call to prayer, from the mosque five times during the day; a hazzan, or cantor, is a trained musician who sings prayers in the synagogue.