Ancient Roman Main Street through the Old City Cardo Maximus, or simply the Cardo, was the main North-South “Boulevard” of Aelia Capetalina, the Roman and Byzantine city that was established in the 2nd C AD. It was a monumental royal road, which was typical of the grand Roman cities. It is emphasized in the Madaba map, showing that it played a central role in the urban design of the Byzantine city. Ancient Roman Main Street through the Old City (Source: Biblewalks.com)
Aly standing in Roman Cardo 
Mosaic originally found in Jordan, depicting the city of Jerusalem with the Cardo and Church of the Holy Sepulchre in the middle (depicted upside down with stairs coming off the main road) 
Remnants of Old City wall during first Temple Period 
Kevin & Aly: Travel to Israel 