Matthaus Apelles von Lowenstern (c. 1620–c. 1662) was a German composer and musician primarily known for his contributions to the early Baroque music scene. He was a prolific writer of vocal and instrumental music, particularly noted for his innovative use of the violin and his compositions for various ensembles. Lowenstern's most notable works include his collection "Musicalische Seelenlust" (Musical Soul's Delight), published in 1645, which features a range of vocal pieces that blend sacred and secular themes. His compositions often exhibit a rich harmonic language and intricate counterpoint, reflecting the transitional style from the Renaissance to the Baroque period. Although not as widely recognized as some of his contemporaries, Lowenstern's work contributed to the evolution of German music during a time of significant cultural and artistic development. He is particularly noted for his influence on subsequent generations of composers, paving the way for greater experimentation and expression in vocal music. His exploration of emotional depth in musical storytelling laid groundwork for later Baroque composers, making him an important figure in the history of Western classical music.