The two Vieux Lyon and also the slopes of Croix-Rousse are noted for their narrow passageways (named traboules) that go through structures and backlink streets on either aspect. The main samples of traboules are imagined to have already been in-built Lyon within the 4th century. Source: Bagrin Egor / ShutterstockInstitut https://franzm912hjk6.wikipowell.com/user