The Rue Obscure is magic place that reveals the medieval atmosphere of Villefranche.

Located along the first rampart, the rue Obscure (XIVth century) wasn't covered and formed the continuity of the parapet walk of the soldiers. It allowed the soldiers to circulate and made their operations easier. The street is 130m long. Four doors gave access to the city. Today only the "Portal Robert" remains.

Later, an irregular urbanization filled the lake of habitations on the otherside of the street, "rue du Poilu".

The street is among the listed buildings since 1932.