Mary standing on the moon with emanating sun's rays was probably a common motif. Here is another example (miniature in gradual). However, the moon is shown rotated differently than in the Book of the Holy Trinity.
The Morgan Library & Museum, Nuremberg, 1507-1510, MS M.905 II, You are not allowed to view links. Register or Login to view.
The Morgan Library & Museum, Nuremberg, 1507-1510, MS M.905 II, You are not allowed to view links. Register or Login to view.

