Star of David on Papal Coat of Arms

Star of David (representing Hope) on the Coat of Arms of Pope Pius X (1835 –1914)

"The shield displays the arms Pius X took as Bishop of Mantua: an anchor proper cast into a stormy sea… lit up by a single six-pointed star of gold. These were inspired by Hebrews 6:19, which state that the hope we have is the sure and steadfast anchor of the soul".

Source:  English Wikipedia entry: Pope_Pius_X

As I mentioned in privious posts the Fleur de Lis is a hexagram viewed from the side- so that it also hints to the connection of the Popes to the sanctity of the Shoshan (Lily) in the Old Testament.

Fleur de Lis on the Coat of Arms of  pope Urban_IV (1261-1264)

and also on the Coat of Arms of  popes:

 Innocent V (1276-1276)

Nicholas IV(1288-1292)

Paul III  (1534-1549) 

Innocent X  (1644-1655) 

Leo XIII  (1878-1903) 

Paul VI (1963-1978)  According to the prophecy of Saint Malachy in 1139: "His coat of arms features three flowers". 

Source:  English Wikipedia entry: Papal_coat_of_arms