Question: In the Orthodox church, what types of icons are allowed to be venerated and prayed before?
Sentence: Both Roman Catholic and Orthodox Christians venerate images and icons of Mary, given that the Second Council of Nicaea in 787 permitted their veneration with the understanding that those who venerate the image are venerating the reality of the person it represents, and the 842 Synod of Constantinople confirming the same.
Answer in sentence: no