Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Otto III, Duke of Brunswick-Lüneburg (c. 1296 1352) was Prince of Lüneburg from 1330 to 1352. Otto was born about 1296 as the second son of Otto the Strict and his wife Matilda of Bavaria, and was introduced to the business of government by his father as early as 1314. The stipulation by his father in 1315 that the principality was to be divided after his death between Otto III and his brother, William II, was ignored however by the brothers and they took over joint rule of the undivided state in 1330. The focus of their rule in the early years was the territorial consolidation of the principality.