Vertrieu is a small town, the northernmost of the Isere. Vertrieu is bordered by the Rhone, which separates it from the Ain, and that its past. The 12th century fortified house where the guards were watching the Savoy, who was not French, on the other side of the Rhone. The boatmen who transported, among other things, stone and Sault Brénaz Porcieu to Lyon.
Located at the northern tip of Isle Crémieu, along the Rhone, where the river begins its shift to the southwest, Vertrieu is a very interesting example of small rural village. Crossing point by the fords of the Rhone Lagnieu and Sault Brénaz, the site has been occupied since the Roman times.
The creation of the village dates back to the 13th century, concurrent with the construction of the fortified house (which overhangs) and development of port activities. This consists essentially in the trafficking of agricultural products is moving then, from the 17th century, to the delivery of Lyon building stones extracted from local quarries. The activity of the sailors, however, decreases in the late 19th century due to the abandonment of river traffic.
The habitat is mainly concentrated in the village. The houses, organized in a quasi-urban (adjoining habitats) are characteristic of rural housing with their exterior stairs for access to the house. The ground floor houses the most addictive (tightening or cellar). Limestone, the roofs of houses are covered with long tails tucked lined sewer. In the 19th century, some of them have in backyard stables reserved for hauling horses. It remains almost no trace today.
