My thanks to Rossitza Ohridska-Olson who referred me to this impressive outstanding usage of the Christian hexagram in art works and who wrote to me:
These are 2 Christian icons from the Tryavna School of Icon painting authored by Joaniki papa Vitanov. They were painted in the beginning of his career (the historians put them around 1820). The artist was living and working in the Sliven region in Bulgaria. These photos are from the site of the Bulgarian Orthodox Christian Church.
