Das Streckennetz für den Bahverkehr: Die Enwicklung seit der ersten deutsche Eisenbahnverbindung bis zu den Folgen der Bahnreform auf einer interaktiven Karte.
Aqueducts were impressive feats of Roman engineering which supplied cities with fresh water. In the early middle ages, however, they also posed a ‘security risk’ in siege warfare.
Abstract. The ancient civilizations of China and Greece, in the east and the west, have both subsequently deeply influenced other civilizations, regionally and