There is no
rel=canonical in the media detail pages (
_detail). In my opinion, that's not SEO friendly.
id parameter is really useful for hierarchical breadcrumbs, but the same page has multiple URLs.
If I understand Google & co., the canonical URL should be: https://vrbr.ch/_detail/eglises/eglise-st-michel-clocher-pied.jpg
Am I right?