This website isn’t about saint Christopher, but here’s a bit of background information about him as I mention him a lot!
Christopher is best-known today as the patron saint of travellers, and as a giant who carried the infant Jesus across a river. In my period (roughly 600 to roughly 1200) this was not his story. Instead, he was a dog-headed giant from a race of cannibals who uniquely came to know God. He travelled to a city ruled by a pagan king, argued with him, converted loads of people including two women who go on to have their own exciting story, was tortured, and finally executed.
I think his story is especially interesting because of his monstrous nature, but also because there was no local centre promoting his cult because they held his relics (this was the main reason for saints’ stories spreading in this period). His story was also told in a large number of significantly different ways, emphasising different aspects of his saintly heroism, from Germany to Ireland and from Spain to England.