Question

In the ancestry of De Provence I found myself in the geneology of the Holy Roman Emperors (plural) including Constantine the Great but I have not been able to relocate the site, only Louis the Blind

Answer 1

I found that gedcom myself.  If you follow it out it will take you to Antenor II King of Persia 433 BC, but it is full of holes and inacuracy.  Do not take it for gospel. It is great as a road map.  Don't trust all of the data.  It is a Gedcom that begins with William the Conqueror/William of Normandy/William the Red.  The exact site escapes me as, I quit trying to patch the holes and clean up the genealogy after 10 yrs.  Once you do get your self to King Antenor II, you can complete you family tree in the begats in the bible.  Good Luck