Postcard Sieveschlüff, Luxembourg's Little Switzerland, rock labyrinth

Black-and-white postcard of the Sieveschlüff in Luxembourg's Little Switzerland, published by Kunstverlag P.C. Schoren, Luxembourg, as number 42 of the Serie Müllertal. The composition shows a vertical view into the rock cleft, with the layered sandstone walls on either side converging toward a narrow bright opening at the top of the image. On the right-hand wall the same historical carvings are visible as on other cards of this location: the year 1906 and a barely legible name. The printed caption "Petite Suisse luxembourgeoise - Sieveschlüff" appears at the bottom. The card is in good condition.

The Sieveschlüff, in Luxembourgish Siweschlëff or "seven clefts", is a rock labyrinth near Berdorf where sandstone towers slid down a slippery marl layer, forming seven narrow gorges, some only thirty centimetres wide and twenty metres deep. This view shows the cleft seen from below, a composition that emphasises the verticality of the labyrinth. The 1906 carved into the right-hand wall appears on several publishers' versions of this site and was evidently chosen by different photographers as a fixed reference point. The region has belonged to the UNESCO Global Geopark Mëllerdall since 2015. The divided-back layout and the publisher's line "Kunstverlag P.C. Schoren, Luxembourg" without the later "Rue Bourbon" addition place the card in the middle period of Schoren production, around 1910 to 1920.