Principality of Calenberg
Christian Louis (; 25 February 1622 in Herzberg am Harz – 15 March 1665 in Celle) was Duke of Brunswick-Lüneburg. A member of the House of Welf, from 1641 until 1648 he ruled the Principality of Calenberg, a subdivision of the duchy, and, from 1648 until his death, the Principality of Lüneburg.