Iconographer Elias Katsaros doesn't actually paint the icons directly onto the wall. It's more like wallpaper, the Rev. Peter Pier of St. John Chrysostom Antiochian Orthodox Church said.

Icons are stylised, often gilded religious paintings considered sacred in Eastern Orthodox Churches. Andrei Rublyov's Trinity, one of the holiest and most artistically important Russian icons ...

The Rev. Dobrivoje Milunovic, the presiding priest of Holy Resurrection Serbian Orthodox Cathedral in the O’Hare neighborhood, was one of the first priests to visit to venerate the icon.