The Grand Duchy of Berg, also known as the Grand Duchy of Berg and Cleves, was a territorial grand duchy established in 1806 by Napoleon after his victory at the Battle of Austerlitz (1805) on territories between the French Empire at the Rhine river and the German Kingdom of Westphalia.
Seal of the Grand Duchy of Berg (1807)
A grand duchy is a country or territory whose official head of state or ruler is a monarch bearing the title of grand duke or grand duchess.
Coronation of Cosimo I de' Medici as Grand Duke of Tuscany in 1570.
The Grand Duchy of Tuscany (1569–1860, part of Italy afterwards)