"The Catechism of Martynas Mažvydas" is a significant work in the history of the Lithuanian language and Lithuanian literature. Published in 1547, it is recognized as the first printed book in Lithuanian, serving as a religious text aimed at educating the faithful about Christian teachings. Authored by Martynas Mažvydas, the catechism includes basic doctrines of the Christian faith, prayers, and moral guidance. It played a crucial role in promoting literacy and the use of the Lithuanian language during a time when Latin and Polish were dominant in religious contexts.