1497 in History

January 6 Jews are expelled from Graz (Syria)
February 25 Italians troops reconquer Taranto on France
March 9 Nicolaus Copernicus 1st recorded astronomical observation,
May 2 John Cabot departs to North-America
May 10 Italian navigator Amerigo Vespucci leaves for 1st voyage to New World
May 13 Pope Alexander VI excommunicates Girolamo Savonarola
June 22 Antitax insurrection in Cornwall suppressed at Blackheath
June 24 John Cabot claims eastern Canada for England (believes he found Asia in Nova Scotia)
July 8 Vasco da Gama departs for trip to India
July 26 "Edward IV's son" Perkin Warbecks army lands in Cork
August 6 John Cabot returns to Bristol from North-America
August 10 John Cabot tells King Henry VII of his trip to "Asia"
September 7 Sailor Perkin Warbeck becomes English King Richard IV
November 18 Vasco da Gama reached the Cape of Good Hope
November 22 Portuguese navigator Vasco da Gama rounds Cape of Good Hope