The best running trails around Rohrsen

The oldest house in Nienburg is located at Kleine Kirchstraße 2, directly next to St. Martin's Church. It was built around 1490-1500 and is part of the original development around the church.

The former manor house served as a royal post station on the Hanover-London route until 1860. It housed, among other things, the Elector's and later the Royal Hanoverian Post Office, including a postmaster's office, post station, and horse-changing station. Since its restoration in 1977, it has housed the city library. The carillon mounted on the side plays the song "The Little Nienburg Girl" several times a day.

Nienburg's oldest house stands at Kleine Kirchstraße 2, right next to St. Martin's Church. It was built around 1490-1500 and is part of the original development surrounding the church. Its slightly crooked appearance is not without reason, as naturally grown oak beams had to be used for economic reasons at the time, and so the inhabitants quite naturally lived on a sloping floor. This is still visible from the outside today, as the house's basic structure has been preserved. Also, almost nothing has changed in the surrounding area. The unique location next to the chancel of St. Martin's Church prevented any alterations. In and around the house, one can easily imagine oneself transported back to a time over 500 years ago. At that time, castles were being replaced by urban fortresses, and Nienburg became the strongest fortress in the Middle Weser region. It was the time of Copernicus, Columbus, Riemenschneider, Dürer, and Leonardo da Vinci, who was competing with Michelangelo in Italy and had just completed what is now the world's most famous painting, the Mona Lisa. Humanity still believed it lived on a flat surface and could only feel somewhat safe behind fortress walls. Source: https://www.pension-st-martin.de/Wie-alles-begann

The glacial erratics from Småland in Nienburg/Weser are impressive relics of a natural history dating back tens of thousands of years. These large, often smoothly polished boulders originally came from the southern Swedish region of Småland and were transported to northern Germany by mighty glaciers during the last Ice Age. As the ice sheet slowly moved south, it tore rocks from the Scandinavian bedrock and carried them over long distances. When the ice melted, these so-called erratics were left behind in the landscape – far from their place of origin. Such glacial erratics, which can be geologically clearly attributed to Sweden, can also be found in Nienburg. Their composition, such as granite or gneiss, as well as characteristic structures, allow conclusions to be drawn about their Småland origin. They thus vividly illustrate the immense forces of the Ice Age and demonstrate how profoundly glaciers shaped the landscape we see today. The glacial erratics are silent witnesses to history, forging a connection between the Nienburg region and Scandinavia. Beyond their geological significance, these erratics also play a cultural and design role. In Nienburg, they are deliberately used as striking elements in the cityscape and green spaces, serving simultaneously as a starting point for environmental education and the preservation of historical memory.

The Weser port of Nienburg is closely linked to the city's economic and urban development and exemplifies the importance of the Weser River as a transport and trade route. Nienburg recognized its advantageous location on a navigable stretch of the river early on, leveraging its role in transporting goods and conducting trade. The port evolved as a transshipment point between river shipping and the hinterland, contributing significantly to the city's prosperity. The Weser port experienced a period of great importance, particularly in the 19th and early 20th centuries. Agricultural products, building materials, timber, and other goods were loaded and transported here. The port was a major employer and a vibrant hub where ship owners, merchants, and craftsmen converged. Simultaneously, it shaped the city's image as a confident Weser River trading center. With the transformation of transportation structures and the increasing importance of road and rail, the Weser port gradually lost its central economic function during the 20th century. Nevertheless, it has been preserved as an important infrastructural and historical site. Parts of the port area were transformed into areas for leisure, recreation and urban use, while the proximity to the Weser river remained a defining feature.

@DakenH There were/are also eel slugs on the Rhine. One is located (used for scientific purposes) in the Rhine near Rees.

The Posthof was built around 1560. Formerly the Burgmannshof, it now houses the city library.

The town hall is one of the oldest and most impressive buildings in the city. The first town hall tower, featuring a bell, was built in 1614. It received its current form in 1778/79 and was renovated in 2012.