1543 in science
- Nicolaus Copernicus publishes De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) in Nuremberg, offering entirely abstract mathematical arguments for the existence of the heliocentric universe.
- Robert Recorde publishes The Grounde of Artes, teaching the Worke and Practise of Arithmeticke, both in whole numbers and fractions, one of the first printed elementary arithmetic textbooks in English and the first to cover algebra. It will go through around forty-five editions in the following century and a half.
- Niccolò Fontana Tartaglia publishes a translation of Euclid's Elements into Italian, the first into any modern European language.
- Andreas Vesalius publishes De humani corporis fabrica (On the Fabric of the Human Body), illustrated by Jan van Calcar, in Basel, revolutionizing the science of human anatomy. He includes an account of a successful experimental tracheotomy for artificial respiration of a canine subject.
- Ralf Hogge, working for Rev. William Levett, casts iron cannon at his blast furnace in the Sussex Weald of England.
- Lighthouse of Genoa completed in present form.
- Domenico Fontana (died 1607), Swiss-born architect.
- approximate date – William Clowes (died 1604), English surgeon.
- January 3 – Juan Rodríguez Cabrillo (born c. 1499), Portuguese explorer.
- May 24 – Nicolaus Copernicus (born 1473), Polish astronomer.
- "The Scientific Revolution". Western New England College. Archived from the original on 2008-07-05. Retrieved 2010-11-05.
- Johnston, Stephen (2004). "Recorde, Robert (c. 1512–1558)". Oxford Dictionary of National Biography. Oxford University Press. doi:10.1093/ref:odnb/23241. Retrieved 2012-01-26. (subscription or UK public library membership required)
- Burke, James (1978). Connections. London: Macmillan. p. 166. ISBN 0-333-24827-9.
- Rowlett, Russ. "Lighthouses of Italy: Liguria". The Lighthouse Directory. University of North Carolina at Chapel Hill.
- "The Theater that was Rome - Biography". library.brown.edu. Retrieved 3 April 2018.