Albert II of Brandenburg

Albert II (c. 1177–1220), youngest son of Margrave Otto I, ruled Brandenburg from 1205 as the fourth Ascanian margrave. He joined the German Crusade of 1197 and attended the Teutonic Knights' founding in 1198.

At first he supported Philip of Swabia, but after Philip's murder in 1208 he turned to Emperor Otto IV, who confirmed the margraviate in 1212. He secured Teltow, Prignitz and parts of the Uckermark. When he died in 1220 his young sons John I and Otto III succeeded under a regency.