- Mar 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.
- Aug 14 Oldest known exactly dated printed book (c 3 years after Gutenberg)
- Aug 15 Earliest dated book, "Mainz Psalter," completed, 1st to be printed in three colours