Why was the most important Pilgrimage route in Europe to thomas Beckett's shrine in Canterbury?

After Becket was killed ,local people apparently managed to obtain pieces of cloth soaked in his blood. Rumours soon spread that when touched by this cloth, people were cured of blindness, epilepsy and leprosy. It was not long before monks at Canterbury priory were selling blood to visitors. Small glass bottles of beckets blood. That's why ..? he also has a hospital named after him in londo behind the London eye how interesting .. there is my answer..>??>??>>??>>??