What can a non-Christian – or a nonbeliever – see in a work of late-Medieval art?  Quite a lot, needless to say.  Great art involves more than ideology, dogma or messaging. But the question crossed my mind recently as I traveled from Strasbourg, where I have distant family ties, to Colmar, in southern Alsace, to see what’s widely considered a masterpiece of Western art: the Issenheim Altarpiece, painted ca. 1512-1516 by the workshop of Matthias Grünewald, with the sculptural elements done by Niclaus of Haguenau.  The Altarpiece, at the Unterlinden Museum in Colmar, was originally created for a church in Issenheim, some 20 kilometers away.