Year 1493 (MCDXCIII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar). Events January 19 – Treaty of Barcelona: Charles VIII of France returns Cerdagne and Roussillon to Ferdinand of Aragon. April – Christopher Columbus returns to Spain from his first voyage of discovery. May 4 – In the papal bull Inter caetera, Pope Alexander VI decrees that all lands discovered west of the Azores are Spanish. August 19 – Maximilian… (More on 1493)