Events January–December February – The Treaty of Utrecht puts an end to the Anglo-Hanseatic War. March 19 – The Senate of the Republic of Venice enacts the Venetian Patent Statute, one of the earliest patent systems in the world. New and inventive devices, once put into practice, have to be communicated to the Republic to obtain the right to prevent others from using them. This is considered the first modern patent system. July 25 – By signing the Treaty of London, Charles the Bold of Burgundy agrees to support Edward IV of England's planned invasion of France. December 12 – Upon the death of Henry IV of Castile, a civil war ensues between his designated successor Isabella I of Castile, and her niece Juana, who is supported by her husband, Afonso V of Portugal. Isabella wins the civil war after a lengthy struggle, when her husband, the newly crowned Ferdinand II of Aragon, comes to her aid.
Events January–December February – The Treaty of Utrecht puts an end to the Anglo-Hanseatic War. March 19 – The Senate of the Republic of Venice enacts the Venetian Patent Statute, one of the earliest patent systems in the world. New and inventive devices, once put into practice, have to be communicated to the Republic to obtain the right to prevent others from using them. This is considered the first modern patent system. July 25 – By signing the Treaty of London Charles the Bold of Burgundy agrees to support Edward IV of England's planned invasion of France. December 12 – Upon the death of Henry IV of Castile a civil war ensues between his designated successor Isabella I of Castile, and her niece Juana, who is supported by her husband, Afonso V of Portugal. Isabella wins the civil war after a lengthy struggle, when her husband, the newly crowned Ferdinand II of Aragon, comes to her aid.