Horst-Janssen-Museum

The Stadtmuseum Oldenburg is a municipal museum covering the history of the city of Oldenburg, Lower Saxony, Germany.

Oldenburg (German pronunciation: [ˈɔldn̩bʊʁk] ) is an independent city in the state of Lower Saxony, Germany. The city is officially named Oldenburg (Oldb) (Oldenburg in Oldenburg) to distinguish from Oldenburg in Holstein. During the French annexation (1811–1813) in the wake of the Napoleonic war against Britain, it was also known as Le Vieux-Bourg in French. The city is at the rivers Hunte and Haaren, in the northwestern region between the cities of Bremen in the east and Groningen (Netherlands) in the west. It has a population of 170,000 (November 2019). Oldenburg is part of the Northwest Metropolitan Region, with 2.37 million people. The city is the place of origin of the House of Oldenburg. Before the end of the German Empire (1918), it was the administrative centre and residence of the monarchs of Oldenburg.

The Duchy of Oldenburg (German: Herzogtum Oldenburg) named after its capital, the town of Oldenburg was a state in the north-west of present-day Germany. The counts of Oldenburg died out in 1667, after which it became a duchy until 1810, when it was annexed by the First French Empire. It was located near the mouth of the River Weser. When the main lineage of the House of Oldenburg died out in 1667 with Anthony Günther, Count of Oldenburg, it fell to the Frederick III of Denmark of the line of the Dukes of Holstein-Gottorp, who married Grand Duchess Anna Petrovna of Russia, daughter of Peter the Great. Another, his first cousin, Frederick August I, became Duke of Oldenburg in 1774. One of his brothers, Adolf Frederick, became King of Sweden. Another brother, Prince Georg Ludwig of Holstein-Gottorp, was father of Peter I, who became Grand Duke of Oldenburg in 1823. Subsequent Rulers of Oldenburg were all his descendants. Its ruling family, the House of Oldenburg, also came to rule in Denmark, Norway, Sweden, Greece and Russia. The heirs of a junior line of the Greek branch are, through Prince Philip, Duke of Edinburgh, are the rulers in thrones of the United Kingdom and the other Commonwealth realms after the passing of Queen Elizabeth II.

Lappan is a historic bell tower in the city of Oldenburg, Lower Saxony, Germany.The tower is the oldest scheduled landmark in Oldenburg. It is 35m high with a Renaissance dome and survived the fire of 1676 in Oldenburg. The tower once belonged to the Holy Spirit Hospital. In 1709, the previous shingle roof was replaced by a copper dome.

The Haus "Graf Anton Günther" (aka Hotel Graf Anton Günther) is a historic house in central Oldenburg, Germany, dating from 1682.Count Anton Günther is depicted riding a horse on the facade, which was redesigned in the neo-Renaissance style in 1894. The house was used by merchants and tobacco manufacturers. After the great fire in Oldenburg, the building was constructed in 1682 as a merchant's house on the Lange Straße. For 135 years it belonged to the Grovermann family. In 1828, it was bought by Hinrich Lebrecht Kirchhoff. In 1838, the tobacco manufacturer Johann Karl Propping acquired the property. Propping built a tobacco factory designed by the architect Klingenberg. The house changed hands several times in the 1890s until it was bought by the Hoyer brewery. The house became a restaurant and hotel in 1894 and was named "Graf Anton Günther". Professor August Oetken created the large exterior fresco of Count Anton Günther on his horse, Kranich.

The Degodehaus (aka Haus "Degode" or "House Degode") is a historic house in central Oldenburg, Lower Saxony, Germany.

The Old Town Hall (German: Altes Rathaus) is the former town hall in the centre of the city of Oldenburg, Lower Saxony, Germany. In 1635, a Renaissance-style town hall was built on this site by Count Anthony Günther. It was removed in 1886 and the present building was completed in 1888 with elements of the neo-Renaissance and neo-Gothic styles. There is a German restaurant in the basement, the Ratskeller Oldenburg.To the south is St Lamberti-Kirche and to the west is Oldenburgisches Staatstheater.

St. Lambert's Church (in German: St Lamberti-Kirche) is the main Evangelical Lutheran church in the centre of the city of Oldenburg, Lower Saxony, Germany.

The Oldenburg Computer Museum (OCM) is a museum founded in 2008 in Oldenburg (Oldb), Lower-Saxony, Germany that is dedicated to the preservation and operational presentation of the history of home computing.

The Edith-Russ-Haus für Medienkunst ("Edith Russ House") is an art gallery in the city of Oldenburg, Gurkaran Singh, Germany, dedicated to new media art.The gallery was founded due to an endowment from Edith Russ, a secondary school teacher in Oldenburg. It does not have a permanent collection but presents temporary exhibitions and associated events. The building is close to the Peter-Friedrich-Ludwig-Hospital, a cultural centre and former hospital, located to the southwest.

Schlossplatz is the main square in the city of Oldenburg, Lower Saxony, Germany. The square is used for outdoor markets. To the southeast is Schloss Oldenburg. To the southwest is Schlossgarten Oldenburg. To the northwest is St Lamberti-Kirche. To the north is the Schlosshöfe shopping centre.

Haaren is a river of Lower Saxony, Germany. It flows into the Hunte in Oldenburg.