Stars of David in a Roman Mosaic in Tuscany

On oct 6 2015 Rossella Lorenzi, archaeology correspondent for Discovery News, published an article about an Ancient Roman Mosaic found in a small village named Capraia e Limit, in Tuscany, dating to the second half of the 4th century AD, including few Stars of David in a repeated pattern. These Stars of David are white hexagons with black triangles and in the middle of each hexagon there's a red square surrounding a red cross.