Johann Georg Albrechtsberger (1736–1809) was an Austrian composer, music theorist, and educator, primarily associated with the Classical era. He is best known for his contributions to the development of counterpoint and his influence on the teaching of music theory. Albrechtsberger studied under the famous composer Johann Joseph Fux and became a prominent figure in Vienna’s musical landscape. His notable works include a series of masses, symphonies, and chamber music, as well as instructional texts such as "Gründliche Violinschule" and "Die Kunst des Fugen," which showcase his expertise in counterpoint. He was also a mentor to several important composers, including Ludwig van Beethoven, who was influenced by Albrechtsberger's teachings. Albrechtsberger's impact on music lies in his dedication to the academic study of composition, particularly his systematic approach to counterpoint, which laid the groundwork for future generations of composers. His works, while not as widely performed today, contributed to the evolution of Classical music and provided a bridge between Baroque traditions and the burgeoning Romantic style. His legacy endures in the realm of music theory and education.