Heinrich Friedrich Ludwig Rellstab (1799–1860) was a German music critic, poet, and composer, primarily active in the early to mid-19th century. He is best known for his contributions to the field of music criticism and for his association with the Romantic movement in music and literature. Rellstab's genre primarily encompassed classical music, and he is notable for his poetic works that inspired various composers, including the famous song cycle "Liederkreis" by Robert Schumann. His poetry often reflected themes of nature, love, and introspection, which resonated with the Romantic sensibilities of the time. In addition to his poetry, Rellstab served as an influential music critic for several publications, where he championed the works of composers like Franz Schubert and Richard Wagner. His critiques and essays contributed to the public's understanding and appreciation of music, helping to shape the discourse around Romantic music. Although not as widely recognized as some of his contemporaries, Rellstab's impact lies in his role as a bridge between literature and music, fostering a deeper engagement with the emotional and expressive qualities of musical works during the Romantic era.