15c
1400s, Italy and ballet +
1400s, Scottish and golf, the +
mid-1400s, Yemen and coffee +
c. 1440, Gutenberg and the printing press +
1453, Mehmed the Conqueror and the mortar +
1489, Widmann and the minus sign +
1494, Manutius and the semicolon +
1494, Pacioli and the double-entry bookkeeping system +