The Margraviate of Baden was a historical territory of the Holy Roman Empire. Spread along the east side of the Upper Rhine River in southwestern Germany, it was named a margraviate in 1112 and existed until 1803, when it was raised to an electorate. In 1806, the Electorate of Baden, receiving territorial additions, became the Grand Duchy of Baden. The rulers of Baden belonged to the Swabian House of Zähringen.