Rosenheim is a city in Bavaria, Germany. It is an independent city located in the centre of the district of Rosenheim (Upper Bavaria), and is also the seat of its administration. It is located on the west bank of the Inn at the confluence of the rivers Inn and Mangfall, in the Bavarian Alpine Foreland. It is the third largest city in Upper Bavaria with over 63,000 inhabitants. Rosenheim is the economic centre and the busiest place in the region. Geography The population of the actual city is approximately 60,000 inhabitants with up to 125,000 in the surrounding area. Rosenheim is situated in the Upper-Bavarian Alpine Foothills, above sea level and covers an area of . The capital of Bavaria, Munich, is North-West of Rosenheim. Rosenheim station is at the junction of the Munich–Rosenheim, the Rosenheim–Salzburg and the Munich–Innsbruck lines. The landscape around Rosenheim was formed during the last ice age from the advancement of the Inn Valley Glacier and later the Rosenheim lake. The lake existed about 10,000 years ago, covering the whole Inn valley as far as Wasserburg am Inn, about north of Rosenheim. Even today in many places around the city the former shoreline can be recognised where the former flat lake bed changes suddenly into relatively steep embankment. History Rosenheim's development can be traced from its location on intersecting major trade routes. Even in early times, the town's intersecting traffic stimulated its development as a market town. It subsequently evolved from a market to a salt trade and then railway town to today's wood and college city. Pons Aeni Crucial to the establishment of Rosenheim were the Inn and the corresponding Inn valley. The Romans arrived in the year 15 BC under the leadership of Drusus and Tiberius. They founded the province Noricum to the East of the Inn and Rhaetia to the west of the Inn. The colonizers built a road through the Brenner to Castra Regina, and an east–west road from Iuvavum to Augusta Vindelicum. The intersection of these two enormously important trade routes were protected by a military station whose name was "Pons Aeni". Less frequently used terms were "Ponte Aoni", "Ad enum" or "stations Enensis". The Romano Celtic settlement existed for some 500 years with that name. Pons was between Aeni Isinisca (Aying) and (today part of Seeon-Seebruck), as shown on the Roman road map Tabula Peutingeriana from the 4th century. The