Baldwin II of Courtenay (1217 October 1273) was the last emperor of the Latin Empire of Constantinople. Baldwin II (1217-1273). He was a younger son of Yolanda of Flanders, sister of the first two emperors, Baldwin I and Henry of Flanders. Her husband, Peter of Courtenay, was third emperor of the Latin Empire (also known as Romania, not to be confused with modern Romania), and had been followed by his son Robert of Courtenay, on whose death in 1228 the succession passed to Baldwin, then an 11-year-old boy. The barons chose John of Brienne (titular king of the Kingdom of Jerusalem) as emperor-regent for life; Baldwin was to rule the Asiatic possessions of the empire when he reached the age of twenty. He was also to marry Marie of Brienne, daughter of John and his third wife Berenguela of Leon, and on John's death to enjoy the full imperial sovereignty. The marriage contract was carried out in 1234. Since the death of Baldwin's uncle, Emperor Henry of Flanders in 1216, the Latin Empire had declined and the Byzantine (Nicene) power advanced; and the hopes that John of Brienne might restore it were disappointed.