Peach wall
Montreuil, France
Peach walls are a French technique of growing peach trees beside walls, with limbs being espaliered or trellised. Peach walls were established as early as the 17th century in Montreuil, Seine-Saint-Denis. At their peak in 1870, the Montreuil peach orchards were 600 km long and produced 17 million peaches. These crops, unique alongside those of Chasselas de Thomery, near Fontainebleau, which adopted the same principle, enabled fruit varieties usually reserved for the mild climates of southern France to be produced in the climate of the Paris region.
Garden data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).