These seven saints were Celtic monks from Britain from around the 5th or 6th century who brought Christianity to Armorica and founded its first bishoprics.
The routes lead from one cathedral city to another and are detailed without any religious aspect being imposed on the reader.
The “Tro Briez”, or Tour of Brittany, as it was known, drew people in their thousands during the 12C to the 16C, with its popularity reaching a peak in the 14C; estimates suggest that crowds numbering up to 30,000 to 40,000 pilgrims were taking to the roads.
Whoever failed to carry out this duty was supposed to have to undertake the pilgrimage after death, advancing by one coffin-length every seven years... Today, ever increasing numbers make the same journey, in groups or alone, retracing the steps of the earlier pilgrims.
[citation needed] In 2002, after successfully completing the seven-year tour, the pilgrimage moved on to Wales, whence many of the bishops came.