This summer, though, Shama's shop, Cactus, attracted a handful of visitors prepared to brave the violence. A team of forensic archaeologists and biblical scholars have been poring over a network of tunnels Shama unearthed under his shop several years ago. They believe he has made a discovery so remarkable it will rewrite the history books, changing our understanding not only of the Holy Land but of the life of Jesus himself.

Shama began excavating the tunnels after he and his Belgian wife, Martina, bought the shop in 1993, and found a series of 4ft-high passages, separated by columns of small bricks supporting a white marble floor. In one corner they found a walled-off room where a residue of wood ash revealed it once served as a furnace.

The American excavators are convinced that what Shama has exposed is an almost perfectly preserved Roman bathhouse from 2,000 years ago - the time of Christ, and in the town where he was raised. In a piece of marketing that is soon likely to be echoing around the world, Shama says he has stumbled across the "bathhouse of Jesus". The effects on Holy Land tourism are likely be profound, with Nazareth becoming a challenger to Jerusalem and Bethlehem as the world's most popular site of Christian pilgrimage.