March 1 » The Unitas Fratrum is established in the village of Kunvald, on the Bohemian-Moravian borderland. It is to date the second oldest Protestant denomination.
August 14 » Publication of the Mainz Psalter, the first book to feature a printed date of publication and printed colophon
When copying data from this family tree, please include a reference to the origin: Enno Borgsteede, "Borgsteede family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-borgsteede/I2652.php : accessed February 15, 2026), "Sir Edward Grey , 1st Lord Ferrers (of Groby) (????-1457)".
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