[4] These 2.50 to 3-meter-high walls, made of stones held together with earth mortar, were erected for Thomery's particular espalier grape-growing technique, to restore as much heat as possible to the vines grown in this very northerly area for table grapes.

There is also another path of this type, but not listed, called the “sentier rural des Grands-Clos”, in the lower part of Thomery, running alongside the rue du 4-Septembre.

The first walls were built around 1730, followed by a second major wave in 1840 with the success of vine growing and the increase in grape production in the second half of the nineteenth century.

[8][9][10] Today, however, they are far fewer in number and the vast majority of them have no vines, serving as cadastral boundaries between the plots of private homes built in the 20th century with the decline in Chasselas production.

[13] For the most part, they are on private property, but the commune has created a public passageway called “Chemin des Longs Sillons”, starting near Thomery town hall and running through the middle of this perimeter from rue de la République to rue de By over a total length of 645 meters.