Lippe-Biesterfeld was a comital cadet line of the House of Lippe (a German dynasty reigning from 1413 until 1918, of comital and, from 1789, of princely rank). The comital branch of Lippe-Biesterfeld ascended the throne of the Principality of Lippe in 1905, after the extinction of the ruling main branch, when count Leopold of Lippe-Biesterfeld became Leopold IV, Prince of Lippe. He continued to rule until the German Revolution of 1918. In 1916, he created his younger brother, count Bernhard of Lippe-Biesterfeld, a prince. Through the latter's son, Prince Bernhard of Lippe-Biesterfeld (1911–2004), the prince consort of Queen Juliana of the Netherlands, it also became a title of the Dutch Royal House, created in 1937.