Above the Schützenplatz (Rheinhöhenweg) in Oberlahnstein, a footpath leads today to the memorial for the fallen of the First World War. The prominently visible cross was planned and executed on a hilltop under the National Socialists in the style of the time. Characteristic of the era was the construction of a parade ground (26x16 meters) and the addition of the symbols of power of National Socialism. Both were realized with "Eagle" and "Flame Bowl." According to documents, during the two-year construction phase from the first groundbreaking to the inauguration, "17,500 cm³ of earth and rock masses were managed, 932 cm³ of masonry from rubble stones was piled up, and 108 cm³ of reinforced concrete was tamped into load-bearing foundations." The names of 194 fallen or missing soldiers of the First World War 1914/18 are inscribed on the seven cast iron plaques. At the crenelated Rhine front, the 19.80 m high iron cross was erected.

The consecration took place on 23.06.1935.
After the Second World War, the memorial on Martinsberg lost significance. The swastika was immediately removed from the state symbols of the Third Reich by city council decision. Since then, public commemorations on national mourning days have focused on the cemeteries, where, in addition to the fallen of the First World War, those of the Second World War, including civilians killed in the conflict in Lahnstein, were buried and memorial cemeteries were established.