
The green leaves' angles do not obey exactly the rules of drawing a pentagram (Solomon’s seal), but I think that the first pentagram drawer might have been influenced by this innocent vegetable...
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.

Detail from the previous Gaulish Mosaic posting . The symbol on the bottom left looks like a swastika.
Hexagram at the upper left corner of a Gaulish mosaic floor as one of few symbols. Usually researchers say that geometric symbols serve a decorative purpose, but IMHO they serve a religious purpose and I hope to prove it in the near future. 
A Star of David was discovered in the year 1927...The first archeological excavations began in the years 1922-1932 by a Danish expedition. The finds were placed in the Danish National Museum in Copenhagen…
Picture is courtesy of Israel Medad
I already published two photos of the mosaics at Casale near Piazza Armerina, Sicily. This one is a close-up on a detail from a bigger mosaic. Picture is courtesy of uromattox who published it on Flickr.

The twelve six-pointed stars first came to light on flags of the South: the 57th Georgia, 9th Mississippi and 1st Florida. These were Braxton Bragg's Battle Flags of 1862. They showed up again: a 1995 postage stamp…Another star can be found on the Army of the United States, Eighth Corps Battle Flag of 1862.
1862- Confederate states stamp with 4 Hexagrams