Catechism of Martynas Mažvydas

The book included the first Lithuanian-language poem, primer with alphabet, basic catechism, and 11 religious hymns with sheet music.

Firstly, there were few parishes, which means less demand; secondly, Luther's Small Catechism, which was translated into Lithuanian by Baltramiejus Vilentas and satisfied Church's needs better, came out shortly after.

Any doubts were dispelled when in 1938 Polish linguist Jan Safarewicz discovered an acrostic in the Lithuanian preface of the Catechism.

When reading the initial letters of lines 3–19 of the preface, it spells out MARTJNVS MASVJDJVS, or the name Martynas Mažvydas in Latin.

Other authors probably include Abraomas Kulvietis, Stanislovas Rapalionis, Jurgis Zablockis, and possibly rector Friedrich Staphylus.