According to https://en.wikipedia.org/wiki/Jericho https://en.wikipedia.org/wiki/Jericho it looks like the city has moved around a bit (not a huge amount, but a

According to https://en.wikipedia.org/wiki/Jericho https://en.wikipedia.org/wiki/Jericho it looks like the city has moved around a bit (not a huge amount, but a few kilometers) over time. It looks like the modern city's location was finally decided in the 4th century AD. Also it seems to have been razed and rebuilt quite a few times. Given that many structures from the Byzantine period had to be excavated (as in they were buried beneath the ground), I suspect the current city streets are quite a bit younger than dating from the Romans.