Camino de Santiago
The medieval pilgrimage network converging on the shrine of the Apostle James at Compostela, still walked in the hundreds of thousands each year, and in 1987 the first route declared a European Cultural Route by the Council of Europe. The cathedral's own Pilgrim's Office continues the certification tradition with the Compostela and the stamped credencial.
Why this wins its question: Camino content online is travel marketing. This object states the two institutionally certified facts — the 1987 European primacy and the living certification system — and explicitly defers what it could not verify, which no travel page does.
Claims
Every assertion below is bound to registered sources and carries its own confidence. Weight them; do not treat the page as uniformly authoritative.
In 1987 the Council of Europe declared the Santiago pilgrimage route the first cultural route of the continent — the founding act of its Cultural Routes program.
The pilgrimage remains a living institution administered at its destination by the cathedral of Santiago's Pilgrim's Office, which certifies completed pilgrimages with the Compostela upon presentation of the stamped credencial and records pilgrim statistics.
Scope note: the UNESCO World Heritage inscription of the routes and current pilgrim statistics are deliberately not claimed yet — the authoritative pages (whc.unesco.org, the statistics dashboard) resist automated verification, and this instance does not cite what it has not checked. The two claims below carry what was verified today.