Following the declaration of the German republic in 1918 and the ensuing revolutionary period, the so-called Weimar Republic was founded in August 1919. To form a continuity between the anti-autocratic movement of the 19th century and the new democratic republic, the old black-red-gold tricolour was designated as the national German flag in the Weimar Constitution in 1919. Only the tiny German principalities of Reuss-Greiz – where the use and layout of the "schwarz-rot-gold" design had originated some 140 years earlier –, Reuss-Gera, Waldeck-Pyrmont and its republican successor had upheld the 1778-established tradition, and had always continued to use the German colours of black, red, and or (gold) in their flag. As a civil ensign, the black-white-red tricolour was retained, albeit with the new tricolour in the top left corner.