The Flag of Hesse-Kassel, in both Landgraviate (1567-1803), and Electorate (1803-1807, 1814-1866), as well as the Prussian Province of Kurhessen (1944-1945), and the German Provinces of Greater Hesse (1945-1946) and Hesse (1946- ).
This flag is the flag of Monarchist Tuscany (the Duchy of Florence and later, after the annexation of the Republic of Siena, the Grand Duchy of Tuscany) under the House of Medici.
Flag of the Italian Regency of Carnaro, a short lived city-state in Fiume (now Rijeka in Croatia) that lasted fifteen months (12 September 1919-30 December 1920), before it was conquered by the Kingdom of Italy.
Shield made by Melkor89 and Flag made by skbrewer.
Flag of Württemberg, which includes the County of Württemberg (1089-1495), the Duchy of Württemberg (1495-1803), the Electorate of Württemberg (1803-1806), the Kingdom of Württemberg (1806-1918), the Free People's State of Württemberg (1918-1945) and the State of Württemberg-Hohenzollern (1945-1952)
The Striped Flag Variant of the Bavarian Flag. Officially the flag of the Free State of Bavaria from 1953, but may have seen use during the era of the Kingdom of Bavaria.