Neuss (German pronunciation: [ˈnɔʏs]; spelled Neuß until 1968; Limburgish: Nüss; Latin: Novaesium) is a city in North Rhine-Westphalia, Germany. It is located on the west bank of the Rhine opposing Düsseldorf. Neuss is the largest city within the Rhein-Kreis Neuss district. It is primarily known for its historic Roman sites, as well as the annual Neusser Bürger-Schützenfest. In 1984 Neuss celebrated 2000 years since its foundation. It therefore holds the title of "Germany's oldest city" alongside the city of Trier.
Neuss was founded by the Romans in 16 BC as a military fortification (castrum) with the current city to the north of the castrum, at the confluence of the rivers Rhine and Erft, with the name of Novaesium. Later a civil settlement was founded in the area of today's center of the town during the 1st century AD. Novaesium, together with Trier (Augusta Treverorum), is one of the three oldest Roman settlements in Germany.
Neuss is a Kreis (district) in the west of North Rhine-Westphalia, Germany. Nearby are the urban districts Mönchengladbach, Krefeld, Duisburg, Düsseldorf, Cologne, the districts Rhein-Erft-Kreis, Düren, Heinsberg and the district Viersen.
In 1816 the districts Grevenbroich and Neuss were created when the whole area became part of Prussia. The city Neuss left the district in 1913 to become an urban district. In 1929 the two districts were merged into the new district Grevenbroich-Neuss, which was renamed to Grevenbroich in 1946. In 1975 the urban district of Neuss lost its independent status and was merged into the Grevenbroich district, which was renamed to Kreis Neuss to represent the new administrative seat. On May 26, 2003 it changed its name, and is now officially called Rhein-Kreis Neuss.
The main rivers of the district is the Rhine which forms most of the north-eastern border of the district, as well as the Erft. In the southern part of the district are big open pit Lignite (brown coal) mines.