Maciej Albin or Latin Matthias Albinus (fl. 1570s) was a Polish Calvinist minister at Iwanowice Dworskie who became the first to administer Believer's baptism in Poland, and then became openly Unitarian.

Overview He differed from the Calvinists and many of the Arians at Pińczów in denying the pre-existence of Christ. And at the Synod of Skrzynno in 1567 stood with Georg Schomann, Gregory Pauli and Marcin Czechowic among the Polish Brethren.Walerjan Krasinski Historical sketch of the rise, progress, and decline of the Reformation in Poland 1838 p361 Although the term Socinian is anachronistic, he was counted among Socinian authors by Christopher Sandius.Christopher SandiusBibliotheca antitrinitariorum p48

Robert Robinson's Ecclesiastical Researches (1792)Robert Robinson Ecclesiastical Researches 1792 p.580 incorrectly states that Albinus was a Trinitarian till the end of his life but this is contradicted by Bock, Historia Antitrinitarianorum.Friedrich Samuel Bock, Historia Antitrinitariorum, 2 vols. 1776-1783. p1040Robert Wallace, Sketches of the lives and writings of distinguished antitrinitarians - Page 239 1850 "Matthias Albinus continued a Trinitarian till his death; but Bock has included him in his supplementary list of ...

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