Photo courtesy of "rts boink"
who published it on Flickr. He wrote to me:
Among the things I collect are mililtary and medical patches
This blog 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.
This is the floor design throughout most of Qait Bey Citadel in Alexandria, Egypt. I took the picture because I find the prevalence of the Star of David in Islamic architecture to be very interesting. The Citadel was built in the late 1400s on the remains of the Lighthouse of Alexandria during the Mamluk period. The mosque it contains is believed to be among the oldest in Alex.