The Ilm (German pronunciation: [ɪlm] ) is a 128.7 kilometers (80.0 mi) long river in Thuringia, in central Germany. It is a left tributary of the Saale, into which it flows in Großheringen near Bad Kösen.
Towns along the Ilm are Ilmenau, Stadtilm, Kranichfeld, Bad Berka, Weimar, Apolda and Bad Sulza.
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Ilmenau (German pronunciation: [ˈɪlmənaʊ] ) is a town in Thuringia, central Germany. It is the largest town within the Ilm district with a population of 38,600, while the district capital is Arnstadt. Ilmenau is located approximately 33 km (21 miles) south of Erfurt and 135 km (84 miles) north of Nuremberg within the Ilm valley at the northern edge of the Thuringian Forest at an elevation of 500 metres (1,640 feet).
The most important institution in Ilmenau is the Technische Universität Ilmenau, a public research university and Thuringia's only "Technical University" with about 4,900 students and an emphasis on engineering disciplines, computer science, mathematics, natural sciences, economics, and media studies. Its precursor was founded in 1894 and developed into a university in 1992. Since 1990, many research institutes have been established in the vicinity making Ilmenau an important hub of technological research.
Schloss Weimar is a Schloss (palace) in Weimar, Thuringia, Germany. It is now called Stadtschloss to distinguish it from other palaces in and around Weimar. The building is located at the north end of the town's park along the Ilm river, Park an der Ilm. It forms part of the World Heritage Site "Classical Weimar", along with other sites associated with Weimar's importance as a cultural hub during the late 18th and 19th centuries.
From the middle of the 16th century it was the residence of the Dukes of Saxe-Weimar and, after they inherited the Duchy of Saxe-Eisenach in 1741, of Saxe-Weimar and Eisenach, which became the Grand Duchy of Saxe-Weimar-Eisenach from 1809 until the German revolution of 1918–1919. Names in English include Palace at Weimar, Grand Ducal Palace, City Palace and City Castle.
Ilm-Kreis is a district in Thuringia, Germany. It is bounded by (from the north and clockwise) the city of Erfurt, the districts of Weimarer Land, Saalfeld-Rudolstadt and Hildburghausen, the city of Suhl, and the districts of Schmalkalden-Meiningen and Gotha. It is named after the river Ilm, flowing through the district.