Geoffrey I
Afterward Geoffrey I devoted himself to enlarging his possessions. With the aid of Otto I, the lord of Athens (1204–1225), he seized, in 1209 or 1210, the fortress of Acrocorinth where first Leo Sgouros, and then Theodore Komnenos Doukas, brother of Michael I of Epirus had resisted the attacks of the crusaders. In the months that followed, Nauplia was also taken, and early in 1212 the stronghold of Argos, where Theodore Komnenos Doukas had stored the treasure of the Church of Corinth, likewise fell into the hands of Geoffrey I and Otto I. When Albertino and Rolandino of Canossa, the lords of Thebes had left their town, the lordship of Thebes was divided equally between Geoffrey I and the lord of Athens.