Primož Trubar was a Slovenian Protestant reformer and writer, born in 1508. He is best known for his role in the development of the Slovenian language and literature. Trubar was the first to publish books in Slovenian, including the Catechism in 1550 and the New Testament in 1560, which helped standardize the language. Trubar's work laid the foundation for the Slovenian literary tradition and contributed to the spread of Protestantism in Slovenia. He was a key figure in the Reformation movement, advocating for religious and educational reforms. His efforts significantly influenced Slovenian culture and identity.