The Commentariolus (litte commentary) is a manuscript of Nicolaus Copernicus in which he outlines his revolutionary theory of the solar system. While his major work De revolutionibus orbium coelestium was published in 1543 in six books, he had written the abstract Commentariolus on only six pages, and likely between 1507 and 1515, with some scholars even believing as late as 1533 due to the maturity of the theory. Nicolaus Copernicus (February 19, 1473 – May 24, 1543) was an astronomer who provided the first modern formulation of a heliocentric (sun-centered) theory of the solar system in his epochal book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres). ... Title page of De revolutionibus De revolutionibus orbium coelestium (English: On the Revolutions of the Heavenly Spheres, Polish: O obrotach sfer niebieskich) is the seminal work on heliocentric theory and the masterpiece of the great Polish astronomer Nicolaus Copernicus. ...

It is unknown who received the manuscript, and when. However, people urged him to publish, namely Nikolaus Cardinal von Schönberg, the Archbishop of Capua, in 1935. Georg Joachim Rheticus and Tiedemann Giese then were instrumental for publishing of De revolutionibus itself. Nikolaus Cardinal von Schönberg (born 11 August 1472 in Roth-Schönberg near Meissen, Saxony/Germany, died 7 September 1537 in Capua, Italy) was an Archbishop of Capua. ... Georg Joachim von Lauchen Rheticus was born in 1514 at Feldkirch, Austria and died in 1574 at Kosice, Hungary. ... Tiedemann Giese (June 1, 1480 - October 23, 1550) of the Patrician family Giese from Gdańsk became bishop of Chełmno, then bishop of Warmia. ...