Nicaea II sanctioned the tradition according to which "venerable and holy images, done in color, mosaics and all other appropriate materials, of our Lord God and Savior Jesus Christ as well as those of Mary Immaculate, the Holy Theotokos, the honorable angels and all holy and pious people are to be exposed in the holy churches of God, on sacred vessels and vestments, on the walls and on the floors, in the houses and in the streets."(
neque mala vel bona quae vulgus putet: multos qui conflictari adversis videanturbeatos, at plerosque quamquam magnas per opes miserrimos, si illi gravem fortunam constanter tolerent, hi prospera inconsulte utantur.vatican.va vatican.va