Wilting in the summer sun, a line of tourists waits to climb Notre Dame cathedral and meet its gargoyles.
About 13 feet beneath them, a team of archaeologists is digging the other way — straight down and back in time, to Roman Paris 2,000 years ago.
At the cathedral's birth in 1163, the entire square was packed with medieval houses, split by a single street. The archaeological team has reached their cellars — and therefore also the time in histor...
