There's a plaque on the city gate at Laon stating the distances to different places. Paris is 135 km away; Reims, 45; Chartres, 235. Rome is 1661 km.
And the real challenge? 4,300 km to Jerusalem.
"Vous êtes à la porte de toutes vos randonnées" says the plaque - you are at the start of all your travels.
And so I am... thinking... 4,300 km at 30 km a day, let's say, is 143 days. Five months. Without allowing for rest days. And assuming I walked the lot; but I might take ship for part of it, as the medieval pilgrims did... And the route could go through Constantinople.
So, I might be at the start of a journey. Next year in Jerusalem... But I'm going to need a lot of help to make it work!