Monumenta medii aevi historica res gestas Poloniae illustrantia. Cracoviae: sumptibus Academiae literarum Cracoviensis, 1874——, in 15 vols. Indispensable to the student of the sixteenth century.
Much information of first class importance has been obtained from the following works:
Zakrzewski, Wincenty, Powstanie i wzrost Reformacji w Polsce (The Rise and Development of the Reformation in Poland), Leipzig, 1870.
Krasiński, Walerjan, Dzieje Reformacji w Polsce (A History of the Reformation in Poland), Warsaw, 1903. This work was published originally in English, in London, under the title of A Historical Sketch of the Reformation in Poland.
Merczyng, Henryk, Zbory i Senatorowie protestanccy w Dawnej Polsce (Protestant Congregations and Senators in Old Poland), Warsaw.
—— Polscy Deiści i wolnomyśliciele za Jagiellonów (Polish Deists and Free Thinkers in the Time of the Jagiellos), Warsaw, 1911.
Lorkiewicz, Antoni, Bunt Gdański w Roku 1525 (The Danzig Revolt of the Year 1525), Lwów, 1881.
Warmiński, I., Andrzej Samuel i Jan Seklucyan (Andrew Samuel and John Seklucyan), Poznań, 1906.
Łukaszewiez, Józef, Dzieje Kościołów wyznania helweckiego w Dawnej Polsce (A History of Calvinistic Churches in Old Poland), Poznań, 1853.
Brückner, Alexander, Różnowiercy Polscy (Polish Dissidents), Warsaw, 1905.