Restorers have said there is a “very real risk” that the shrine built over Jesus’s tomb may collapse.

Their warning came just as the structure was newly opened to the public after a year-long renovation.

Antonia Moropoulou, chief scientific supervisor at the National Technical University of Athens, which completed the renovation, said: “When it fails, the failure will not be a slow process, but catastrophic.” She told the National Geographic that the project had revealed the shrine was built on unstable remnants of earlier buildings.