he installed his followers as barons, and his men invaded the Morea. Sgouros and his men held out in the citadels of Argos, Nauplia and Corinth, however, even after both Boniface and Sgouros died, in 1207 and 1208 respectively. The three fortresses were kept under siege by the Crusaders until the fall of Acrocorinth in 1210, followed by Nauplia and finally by Argos in 1212. The Lord of Athens, Otto de la Roche (), played a major role in their capture, and as a reward the Prince of Achaea Geoffrey I of Villehardouin () gave him Argos and Nauplia as a fief, along with an income of 400 hyperpyra from Corinth. The area of Damala (Troezen) in the Argolid was also given to the de la Roche, but soon passed to a cadet branch of the family, which assumed the Barony of Veligosti. Despite the establishment of a Frankish lordship in the southern Argolid, however, the Franks were never numerous in the district. Much as happened elsewhere in the Morea, the local Greek magnates simply submitted to their new Frankish lords, but kept their possessions and Orthodox faith, as well as a typically Byzantine culture, as evidenced by the continued construction of Byzantine-style churches during the period. Under the de la Roche family After the death of Otto I, some time between 1225 and 1234, Argos and Nauplia were inherited by his son , while Athens went to Guy I de la Roche (). In April 1251, Otto II sold his Greek possessions to his brother Guy I in exchange of 15,000 gold hyperpyra and the latter's lands and claims in France. Following the fall of Boniface's Kingdom of Thessalonica to the Greek Despotate of Epirus in 1224, the Principality of Achaea emerged as the most powerful and pre-eminent among the Latin states of southern Greece. Inevitably, the other Latin lordships began to be drawn into the orbit of Achaea, which during the early reign of William II of Villehardouin () reached the height of its power and prosperity. Guy I de la Roche was one of William's feudatories, both for Argos and Nauplia, as well as for his possession of one half of Thebes As a result, he participated in the siege and conquest of the last Greek stronghold in the Morea, the fortress city of Monemvasia (1246–1248), alongside William. At about the same time, William received from the