Askenazi Synagogue, Istanbul

Red Jewish Star appears on a stained glass window of the Askenazi Synagogue in Istanbul, which was constructed by Jews of Austrian origin.
Picture is courtesy of Michael Summers  ("canonsnapper") who published it on Flickr. 
To me it looks like a Photoshop design of the full moon after the visit of an Israeli astronaut.

Krijtberg church, Amsterdam

Hexagrams surrounded by circles carved on the facade of the Roman Catholic Krijtberg (Chalk Hill) church on Singel street in Amsterdam. Also called : St. Franciscus Xavierius; built by Architect Alfred Tepe, 1881-1883 on a Jesuit hidden church which was founded in 1654

CC picture by David Silverline from Flickr