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.
Picture is courtesy of Jordan Horner who wrote to me that he spotted this along an abandoned house lattice at a ghost town near to Liwa, Sultanate of Oman.