Program: Music by Praetorius and arrangements of traditional carols. Founded in 1990, Ensemble Galilei has made a name for itself through innovative chamber music concerts that incorporate images and words as well as music. Taking a cue from programs that the ensemble presented with curators at the National Geographic Society and the Metropolitan Museum of Art, Gallery music department head Stephen Ackert combined the ensemble's holiday repertoire with images of paintings from the Gallery's permanent collection, which have in past years been featured on Christmas stamps issued by the Unites States Postal Service.