Occupation of the Ruhr important harbour in Duisburg-Ruhrort, ending French occupation of the Ruhr region on 25 August 1925. According to Sally Marks, the occupation of the Ruhr "was profitable and caused neither the German hyperinflation, which began in 1922 and ballooned because of German responses to the Ruhr occupation, nor the franc's 1924 collapse, which arose from French financial practices and the evaporation of reparations". Marks suggests the profits, after Ruhr-Rhineland occupation costs, were nearly 900 million gold marks. Despite his disagreements with Britain, Poincaré desired to preserve the Anglo-French entente and thus moderated his aims to a degree. His major goal was
Ruhr from over 140 different countries. Almost all their descendants today speak German as a first language, and for various reasons, they do not identify with their Polish roots and traditions, often their Polish family names only remain as a sign of their past. The Industrial Heritage Trail () links tourist attractions related to the European Route of Industrial Heritage in the Ruhr area. Ruhr is known for its numerous cultural institutions, many of which enjoy international reputation. Ruhr has three major opera houses and more than 10 theaters and stages. There are special classical music halls like the Bochumer Symphoniker,