Danube
The Danube flows through many cities, including four national capitals (shown below in bold), more than any other river in the world. Ordered from the source to the mouth they are:
The Danube is navigable by ocean ships from the Black Sea to Brăila in Romania and by river ships to Kelheim, Bavaria, Germany; smaller craft can navigate further upstream to Ulm, Württemberg, Germany. About 60 of its tributaries are also navigable.
Commissions of the Danube River
This report led the "Commercial and Financial Chronicle" of New York City to suggest, in particular, the reduction of "dues which it [the EDC] has imposed." British interests since 1918 had turned the Danube into a virtual European Thames. Before the war, reported Clair Price of the "New York Times,"the Danube was in the hands of riverain [river-bordering] groups, but since then Furness, Withy and Co., large United Kingdom shipholders, have obtained a virtual monopoly. . . . It operates a steamer service from British ports to the Levant [Eastern Mediterranean], the Black Sea and to Sulina, Galatz and Braila, where British tonnage has long been preponderant.