The Heroes' Cross on Mount Caraiman, officially called the Commemorative Cross of Romanian Heroes of World War Iis a historical monument located in the Bucegi Mountains. It is in the shape of a Latin cross, with a height of 39.3 meters and was built between 1924-1928 near caraiman peak, at an altitude of 2291 m, to honor the memory of the 30,000 Romanian soldiers fallen in the battles of Prahova Valley, in the First World War. Other names under which the monument is met are: The Cross of the Heroes of the Nation, , the Heroes Monument on Caraiman or popular, the Cross on Caraiman.In the few documentary information left about this monument, it is stated that the metal structure was built of metal elements from the dismantling of the bridges destroyed in the First World War. From the researches undertaken, it has clearly emerged that the sleepers of the metal structure do not come from contorted metal elements. Following an in-depth analysis of the relationship between the builder of the monument, the C.F.R. Bridges Authority, and the Anonymous Society of the Iron Factories and Resita Domains (U.D.R.) it was found that in the first decade after the end of the great world conflagration, there was an important interest in recycling ferrous materials resulting from war destruction. As the Reșița Plants were the only ones able to ensure the processing of scrap metal, processing that was based on agreements concluded with the C.F.R. Bridges Authority, it follows that the metal structure of the monument was made of recycled iron, which considerably reduced the construction costs. The author of the project was the architect Ludovic Dolinschi, a quasi-famous artistic personality.