cave, which, of course, has been shaped, but this wall is artificial. >> next door is called the cave of st. jerome, the cave of the holy innocents. >> father murphy-o'connor took us there for a look. so, there's very little evidence of the original cave left here. >> what evidence there is of the original cave is found below us here. >> so, tradition has it that christ would have been born over there, on the other side of this cave, but this is part of the same cave system. >> it's all part of the cave system. you can see that that's an entirely artificial wall. it goes up to the roof of the cave. you can see the bedrock all above us. and this is the area that has been excavated. >> the excavation in the early 1960s turned up evidence that this cave was occupied during the time of king david right up through the time of jesus. >> there were traces of dung and broken pottery and coins, so it was used for stabling and for storage. ♪