John I, Duke of Brunswick-Lüneburg
| John I | |
|---|---|
| Duke of Brunswick-Lüneburg | |
| Prince of Lüneburg | |
| Reign | 1269 – 1277 |
| Spouse(s) | Liutgard of Holstein |
| Issue | |
| Noble family | House of Welf |
| Father | Otto I, Duke of Brunswick-Lüneburg |
| Mother | Matilda of Brandenburg |
| Born | c. 1242 |
| Died | 13 December 1277 (aged 34–35) |
| Buried | St. Michael's Church, Lüneburg |
John (c. 1242 – 13 December 1277), a member of the House of Welf, was Duke of Brunswick-Lüneburg from 1252 until his death. He initially reigned jointly with his brother, Albert the Tall, until the partition of the duchy in 1269, when John became the first ruler of the newly created Principality of Lüneburg.
John's father, Otto the Child, was the first Duke of Brunswick-Lüneburg, having received the Welf allodial possessions in Saxony from the hands of Emperor Frederick II. After his death in 1252, John ruled the duchy jointly with his elder brother Albert. As the brothers could not agree who should govern the duchy, in 1267 they decided to divide their possession. In 1269 John received the right to choose his part. He chose the northern Lüneburg estates with the city of Hanover, forming the Principality of Lüneburg. Albert received the southern estates of Brunswick-Wolfenbüttel with further lands around Calenberg and Göttingen.
John thus founded the Old Line of Lüneburg and his brother the Old Line of Brunswick-Wolfenbüttel. Nevertheless, the two principalities continued to form the Duchy of Brunswick-Lüneburg which remained undivided according to Imperial law and all the princes of the various Welf lines carried the title of Duke of Brunswick-Lüneburg.
In a fierce feud with Count Gunzelin III of Schwerin, John was able to acquire the settlement of Uelzen, whose residents he vested with town privileges in 1270. He tried in vain to gain control of the Lüneburg Saltworks and finally granted the Lüneburg citizens a monopoly to control the salt trade in his principality, mainly along the Old Salt Route to Lübeck and the Baltic Sea.
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