1503 in science
The year 1503 in science and technology included many events, some of which are listed below.
Astronomy
Exploration
- May 10 – Christopher Columbus first sights the Cayman Islands, which he names Las Tortugas after the numerous sea turtles there.
Technology
- April 21 – Battle of Cerignola: Spanish forces defeat the French, considered the first battle in history won by gunpowder small arms.
- Giuliano da Sangallo constructs the city waIls of Arezzo in Tuscany using the new technology of bastions.