The history of Baden-Württemberg covers the area included in the historical state of Baden, the former Prussian Hohenzollern, and Württemberg, part of the region of Swabia since the 9th century.[1]

In the 1st century AD, Württemberg was occupied by the Romans, who defended their control of the territory by constructing a limes (fortified boundary zone). Early in the 3rd century, the Alemanni drove the Romans beyond the Rhine and the Danube, but they in turn succumbed to the Franks under Clovis I, the decisive battle taking place in 496. The area later became part of the Holy Roman Empire.

The history of Baden as a state began in the 12th century, as a fief of the Holy Roman Empire. As a fairly inconsequential margraviate that was divided between various branches of the ruling family for much of its history, it gained both status and territory during the Napoleonic era, when it was also raised to the status of grand duchy. In 1871, it became one of the founder states of the German Empire. The monarchy came to an end with the end of the First World War, but Baden itself continued in existence as a state of Germany until the end of the Second World War.

Württemberg, often spelled "Wirtemberg" or "Wurtemberg" in English, developed as a political entity in southwest Germany, with the core established around Stuttgart by Count Conrad (died 1110). His descendants expanded Württemberg while surviving Germany's religious wars, changes in imperial policy, and invasions from France. The state had a basic parliamentary system that changed to absolutism in the 18th century. Recognised as a kingdom in 1806–1918, its territory now forms part of the modern German state of Baden-Württemberg, one of the 16 states of Germany, a relatively young federal state that has only existed since 1952. The coat of arms represents the state's several historical component parts, of which Baden and Württemberg are the most important.