This blog (by Zeev Barkan) is dedicated to the Star of David, its history, its various meanings and usages in different cultures. It includes thousands of pictures of Star of David, six-pointed stars, hexagrams, Solomon's Seals, Magen Davids and yellow badges,and served as a resource for three books and four art exhibitions.
Thanks to Serge Eisen for referring me to this painting and for the following comment: the Russian name of the painting is “Бог Саваоф” where Savaof is actually Sabaoth or צבאות in Hebrew.