Johann Spangenberg (1484–1550) was a German composer and music theorist of the Renaissance period, primarily associated with the genre of Lutheran church music. He was a key figure in the development of Protestant sacred music during the Reformation, contributing to the establishment of a distinctly German musical identity. Notable works by Spangenberg include hymns and chorales that were integral to the liturgical practices of the time. His most significant contribution is the collection of hymns entitled *Geistliche Lieder* (Spiritual Songs), published in 1545, which featured both original compositions and adaptations of existing melodies. He is also known for his *Hymnbook*, which provided a framework for congregational singing and emphasized the importance of participatory worship. Spangenberg's impact on music lies in his role in popularizing the use of the German language in sacred music and his influence on later composers. His approach to hymnody helped lay the groundwork for the development of Protestant music, fostering a vibrant tradition that would influence composers such as Johann Sebastian Bach and others in the Baroque era. His work remains a significant part of the Lutheran musical heritage.