The history of Timisoara starts with the Celts, who founded a settlement called Castrum Temesiensis on the banks of the Timis River in the 3rd century BC. The city was conquered by the Romans in the 1st century BC and became an important military and commercial center. Timisoara was also the birthplace of the Banat Swabian dialect. The city was invaded by the Huns in the 5th century AD, and later by the Avars and the Magyars. Timisoara was first mentioned in a document in 1212, and in 1353 it was granted the right to hold markets. The city grew rapidly in the late 19th century, thanks to the development of industry and trade. Timisoara was the first city in Romania to have electric street lighting and a tram system. The city was occupied by the Germans in World War II, and was liberated by the Red Army in 1944. Timisoara became the capital of the Romanian province of Banat in 1945. The city was the scene of a revolution in 1989, which led to the collapse of the Communist regime.