Pro Calendario Gregoriano Disputatio est liber auctore Roest, Petro, editus anno MDLXXXV. In hoc libro, auctor disputat de calendario Gregoriano, quod anno MDCXIII a papa Gregorio XIII institutum est. Roest argumenta pro hac re proponit et contra argumenta opponit. Liber est scriptus lingua Latina et est opus eruditum, quod ad historiam et astronomiam pertinet.This Book Is In Latin.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.