The neighbourhoods we cross every day are the work of architects, entrepreneurs and sculptors who have built our urban environment over the centuries. But, finally, who built the Grand Paris? A game designed to invite young and old to discover the heritage differently. Let your eyes linger on the facades and discover the signatures of architects engraved in stone during a great urban walk organized by the Department of Seine-Saint-Denis, in partnership with Seine-Saint-Denis Tourisme and the City of Aubervilliers.