The drawings of a bee and its parts, as observed under a microscope by Francesco Stelluti in 1630. Francesco Stelluti (12 January 1577 - November 1652) was an Italian scientist who worked in the fields of mathematics, microscopy, and astronomy. In 1625, he published the first accounts of observations using a microscope (specifically, the optical microscope), and his "Persio tradotto in verso schiolto e dichiarato," published in Rome in 1630, is the first book in codex form to contain images of organisms viewed through the microscope.