Today is the first day of Lent for Orthodox Christians. During Clean Week there are many special services of which one of the most important is The Great Canon of St. Andrew of Crete, also known as The Great Canon of Repentance. It is a penitential hymn, the longest ever composed, that is chanted in monasteries on Clean Monday. Because of its great length it is usually broken up in parishes and chanted over the first four days of Lent as part of Great Compline. The linked video is from one of those services. This particular rendition is entirely in...