John IV, relegated to the background since…

John IV, relegated to the background since 1258, is blinded in December and imprisoned in a fortress in Bithynia; spending the remainder of his life as monk, he will die there.

Under the Treaty of Ninfeo, the emperor rewards the Genoese with privileges that challenge the Venetian monopoly of trade and opens up to Genoa the Black Sea markets.

The Palaeologan dynasty is to rule the resuscitated Roman Empire until Constantinople falls permanently to the Ottoman Turks in 1453.