Year 1493 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 - Pope Alexander VI decrees that all lands discovered west of the Azores are Spanish. August 19 - Maximilian I succeeds his father, Frederick III, as Holy Roman Emperor. Septe… (More on 1493)