Ecce Homo

This image is said to be the painting 'ecce homo' which challenged the 18-year-old Zinzendorf to commit his life to the service of Christ. However, in a twist worthy of Dan Brown, that ecce homo picture is decidedly elusive when you try and get beyond the stuff that everyone knows!

Accepted wisdom in Moravian circles is that it was painted by Domenico Feti – but I’ve really struggled to confirm that via artistic sources. I can find an ecce homo by Feti, but it is very different in style and has no inscription. Of course he may have painted more than one. It is also known that the same picture (supposedly!) inspired English hymn writer Frances Ridley Havergal to write ‘I gave my life for thee’ in the 19th century. One account of that event gives the latin inscription as Hoe feci pro te; quid facis pro me? My almost nonexistent Latin would seem to confirm that these words could be those which inspired Zinzendorf – but they almost certainly don’t match those beneath the painting shown at Zinzendorf.com. To further confuse matters, many versions of the Havergal story place the picture in Dusseldorf but cite the artist as Sternberg. Weinlick also suggests that the picture later hung in Munich!

Can anyone out there cast any light on the history of this enigmatic image, or confirm the exact text of the Latin inscription beneath it?