After 1204, when Constantinople fell to the Fourth Crusade, he supported the ruler of Epirus Theodore Komnenos Doukas, to whom his sister Maria was married.
Setelah tahun 1204, ketika Konstantinopel jatuh ke Perang Salib Keempat, ia mendukung penguasa Epirus Theodoros Komnenos Doukas, kepada siapa saudarinya Maria menikah.