This is the house crests of the Three Magii from the bible (the three wise men). It is c1490 though the crests of course were known much farther back than that. This comes from two separate sources, the other being a painting "The adoration of hte Magii".
Notice that one of the crests is effectively the moon and star seen on islamic flags. This is no coincidence, Islam and Christianity have always been closely linked.
@pwgallagher Awesome details. I love this stuff.