Santorio Santorio (29 March 1561 – 22 February 1636), also called Sanctorio Sanctorio, Santorio Santorii, Sanctorius of Padua, Sanctorio Sanctorius and various combinations of these names, was a Venetian physiologist, physician, and professor, who introduced the quantitative approach into the life sciences and is considered the father of modern quantitative experimentation in medicine.
He is also known as the inventor of several medical devices, including the thermometer.
His work De Statica Medicina, written in 1614, saw many publications and influenced generations of physicians.