The Sunday of Orthodoxy is the First Sunday of Great and Holy Lent. The dominant theme of this Sunday since 843 AD has been that of the triumph of the holy icons. In that year Iconoclastic Controversy, which had raged on and off since 726 AD, was finally laid to rest, and holy icons and their veneration were restored on the First Sunday in Lent. Ever since, this Sunday has been commemorated as the "Triumph of Orthodox Christianity."