The Bibliotheca Fratrum Polonorum quos Unitarios vocant or Library of the Polish Brethren called Unitarians 1668 (not 1656 as incorrectly listed in some catalogues) is a collection of writings of the Polish Brethren published by Frans Kuyper, Daniel Bakkamude, and Benedykt's father Andrzej Wiszowaty Sr. (d.1678) in Amsterdam, with Pieter van der Meersche in Leiden. Many of these works had earlier been printed by Rodecki and Sternacki at the printery of the Racovian Academy 1602-1638.