Reichsacht
In his later years, Otto concentrated on his family's estates in Franconia. In the fierce controversy between Emperor Frederick II and Pope Innocent IV, he sided with his feudal lord, the bishop of Bamberg, which earned him an Imperial ban and a large-scale loss of his possessions. Like his Andechs ancestors, he benefitted the Cistercian abbey in Langheim, Franconia, where he was buried upon his death in 1248. He also had vested neighbouring Lichtenfels with city rights in 1231. Childless, he was succeeded in Burgundy by his sister Adelaide and her husband Count Hugh of Chalon, while the Duchy of Merania expired. With the death of Otto's uncle Patriarch Berthold of Aquileia in 1251, the House of Andechs became extinct.