... yes, yes, I understand ... actually already Greek temples had there story-tellers and finally we got a wonderful Greek mythology. Sorry, that I couldn't offer a picture of the devil's finger, but I tried and tried, but didn't get it out of the hole. I've the suspicion, that it was stolen by a souvenir hunter, who sold it at the flea-market or maybe ebay or Christie's.
But the wolf is there, that one, whose soul the devil got, cause he was promised to get the soul of the first who would enter the church, and the wise citizens hunted the wolf through the church door, after the devil had helped to build the church.
But the devil became very angry about the story and he went to the North-sea and filled many sacks with much sand, which with he wished to drown the city and its dome. When he was with his sacks on his way to Aix-des-chapelles and nearly had reached it and it had been a hot day and the devil was exhausted, he asked an old woman, how far he still had to go. But the woman was "lous", which means clever, she recognized him as the devil and his bad intentions, so she pointed to her very old shoes, and told him, that she had bought them this morning at the market in Aix-des-chapelles and now after such a long journey they would look like this. So the devil was disappointed, gave up and dropped his sacks. And so Aix-des-chapelles got a new mountain, which they called Lousberg. And there was found a lot of fire-stones, such, which you usually only find at the border of the ocean, cause the devil got his sand from the North Sea. And the early people of Aix-des-chapelles sold these fire-stones and even exported them till 250 km distance to the Lousberg (with archeological evidence, ca. 4500 BC - till 2500) ... which is a little strange, as the dome had been build c. 800 AD. Anyway, from the fire-stone axes had been build.
But the whole is naturally true, and if you wish to have a nice view on Aix-des-chapelles, you can climb the Lousberg and you'll have a splendid sightseeing and evience, as much you want.
View from Lousberg in direction Haaren, in the background you see the last signs of the disappearing devil with a nine-men-morris-playing-board, and if you look very attentive also with some scribbled flies in his luggage.