In 813,had Leo V the Armenian (813-820) restored the policy of iconoclasm, starting the period of history called the "Second Iconclasm" which lasts from 813 until 842.

I 843, \Empress Theodora restores the veneration of the icons with the help of Patriarch Methodios.

Iconoclasm plays its part in the further alienation of East from West, which worsens during the so-called Photian Schism, when Pope Nicholas I challenges Photios' elevation to the patriarchate.