In Germany, a revival of interest in organ music began with Felix Mendelssohn who wrote six Sonatas, three Preludes and Fugues, and several smaller works for the organ. Josef Rheinberger wrote 20 sonatas for the organ and numerous smaller works, all of which blend the romantic style with the contrapuntal complexity of the old German masters. Johannes Brahms and Robert Schumann did not leave any large-scale works for the organ, but both left behind some smaller works which have attracted considerable attention. During the mid-19th century, composers such as Franz Liszt and Julius Reubke wrote works for the organ of immense scale. Organs being built during this time were larger and had greater dynamic range than organs of the Baroque period, and Romantic composers were determined to exploit the capabilities of these instruments. One of Liszt's most famous organ works is his Fantasy and Fugue on the chorale Ad nos ad salutarem undam. The entire 30-minute work is based on a single theme by Giacomo Meyerbeer and it shows the influence of Liszt's Sonata in B minor for piano. Liszt's student, Reubke, wrote a programmatic Sonata in C minor based on selected verses from Psalm 94. The work, while original in its own right, is heavily influenced by the work of Liszt. These two works are the most monumental compositions for the organ from the mid-19th century.