|• Mayor (2019–24)||Erik Homann (CDU)|
|• Total||102.13 km2 (39.43 sq mi)|
|Elevation||205 m (673 ft)|
|• Density||190/km2 (480/sq mi)|
|Time zone||UTC+01:00 (CET)|
|• Summer (DST)||UTC+02:00 (CEST)|
The Saxon settlement of Sehusa was first mentioned in a 974 deed issued by Emperor Otto II and Chancellor Willigis, from 1235 on it belonged to the Welf dukes of Brunswick-Lüneburg who had a castle erected. In 1428 Seesen received town privileges by Duke Otto II the One-Eyed of Brunswick-Göttingen. On 17 July 1810, Israel Jacobson dedicated in Seesen the first synagogue which employed an organ and a choir during prayer and introduced some German liturgy. This day is celebrated by Reform Judaism worldwide as its foundation date. In 1836 Heinrich Engelhard Steinweg (later named Henry E. Steinway) built his first grand piano in his kitchen in Seesen; the instrument is today on display at New York's Metropolitan Museum of Art.
Seats in the municipal assembly (Stadtrat) as of 2006 elections:
Twin towns – sister citiesEdit
- Konstantin Bernhard von Voigts-Rhetz (1809–1877), Prussian general, born in Seesen
- Wilhelm Busch (1832–1908), piano manufacturer, spent his last years at the Mechtshausen vicarage
- Wilhelm Fitzenhagen (1848–1890), cellist, composer and university teacher, born in Seesen
- Israel Jacobson (1768–1828), established the first Haskalah interdenominational school in Germany at Seesen in 1801
- Louis Spohr (1784–1859), composer that spent his childhood at Seesen
- William Steinway, Piano manufacturer that was born at Seesen on 5 March 1835 as Wilhelm Steinweg. His father Henry E. Steinway (Heinrich Engelhard Steinweg) built his first grand piano at a Seesen washkitchen in 1836
- Emil Wohlwill (1835–1912), chemist, born at Seesen
- "Verzeichnis der direkt gewählten Bürgermeister/-innen und Landräte/Landrätinnen". Landesamt für Statistik Niedersachsen. April 2021.
- Landesamt für Statistik Niedersachsen, LSN-Online Regionaldatenbank, Tabelle A100001G: Fortschreibung des Bevölkerungsstandes, Stand 31. Dezember 2020.
- "Partnerstädte" (in German). Seesen. Retrieved 2022-03-16.
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