The Ottoman governor of Thessaly, Turakhan Beg, breaks through the Hexamilion wall for the fourth time and ravages the Peloponnese peninsula to prevent the Byzantine Despotate of the Morea from assisting Constantinople during the final Ottoman siege of the imperial capital.
Bernardo Bandini de' Baroncegli was captured at Constantinople, the Grand Turk having given him up. He had fled from Florence when Giuliano de' Medici was murdered, believing that his life would be safe at Constantinople.
News arrived that the Duke of Calabria had taken possession of Siena, but it was not true. However, to all intents and purposes, he was master of the place, for the Sienese were helpless, having left him come in with all his troops, and he did what he chose.
I, your servant, have heard about your intention to build a bridge from Stanboul to Galata, and that you have not done it because no man can be found capable of it. I, your servant, know how. I would raise it to the height of a building, so that no one can pass over it because it is so high ... I will make it so that a ship can pass under it even with its sails hoisted.... I would have a drawbridge so that when one wants one can pass on to the Anatolian coast.... May God make you believe these words, and consider this servant of yours always at your service.
Istanbul earthquake destroys 109 mosques and kills an estimated 10,000 people.