Johannes Brahms was a German composer and pianist. Born in Hamburg into a Lutheran family, Brahms spent much of his professional life in Vienna, Austria. His reputation and status as a composer is such that he is sometimes grouped with Johann Sebastian Bach and Ludwig van Beethoven as one of the "Three Bs" of music, a comment originally made by the nineteenth-century conductor Hans von Bülow.
Brahms composed for symphony orchestra, chamber ensembles, piano, organ, and voice and chorus. A virtuoso pianist, he premiered many of his own works. He worked with some of the leading performers of his time, including the pianist Clara Schumann and the violinist Joseph Joachim (the three were close friends). Many of his works have become staples of the modern concert repertoire. Brahms, an uncompromising perfectionist, destroyed some of his works and left others unpublished.
Brahms has been considered, by his contemporaries and by later writers, as both a traditionalist and an innovator. His music is firmly rooted in the structures and compositional techniques of the Classical masters. While many contemporaries found his music too academic, his contribution and craftsmanship have been admired by subsequent figures as diverse as Arnold Schoenberg and Edward Elgar. The diligent, highly constructed nature of Brahms's works was a starting point and an inspiration for a generation of composers. Within his meticulous structures is embedded, however, a highly romantic nature.

Jakob Ludwig Felix Mendelssohn Bartholdy born and widely known as Felix Mendelssohn, was a German composer, pianist, organist and conductor of the early Romantic period.

Mendelssohn is often compared to Mozart. Both of them were child prodigies, both had a talented sister and they both died at a young age. Mendelssohn, who as a child also painted wrote poetry, was born in small family which converted to christianity from judaism. As a composer he preferred looking back, rather than forward: his main examples were Bach, Handel and Mozart. It was Mendelssohn who retrieved Bach from oblivion and pushed for a revival of his music, which still lasts today. One century after its premier, Mendelsson performed the St Matthew Passion for the second time ever, in 1829.

Three years, earlier, on his 17th, he had already composed his masterfully overture A midsummer night's dream op. 21, based on Shakespeare's play. Today, it is still considered as one of the absolute masterpieces in all of the orchestra reperoire. His Violin Concerto op. 64 belongs to the most beautiful works of the 19th century as well. During his travels through Europe, he wrote his brilliant Italian Symphony, Scottish Symphony and the overture The Hebrides.

Although Mendelssohn had a prosperous career, his weak physique made him emotionally vulnerable. The death of his favourite sister Fanny became fatal: Mendelssohn died in the same year, at the age of 38.

Johann Sebastian Bach was a German composer and musician of the Baroque period. He enriched established German styles through his skill in counterpoint, harmonic and motivic organisation, and the adaptation of rhythms, forms, and textures from abroad, particularly from Italy and France. Bach's compositions include the Brandenburg Concertos, the Goldberg Variations, the Mass in B minor, two Passions, and hundreds of cantatas. His music is revered for its technical command, artistic beauty, and intellectual depth.

Bach's abilities as an organist were highly respected during his lifetime, although he was not widely recognised as a great composer until a revival of interest in and performances of his music in the first half of the 19th century. He is now generally regarded as one of the greatest composers of all time.

Johann Baptist Joseph Maximilian Reger (19 March 1873 – 11 May 1916) was a German composer, conductor, pianist, organist, and academic teacher. Born in Brand, Bavaria, Reger studied music in Munich and Wiesbaden with Hugo Riemann. From September 1901 he settled in Munich, where he obtained concert offers and where his rapid rise to fame began. During his first Munich season, Reger appeared in ten concerts as an organist, chamber pianist and accompanist. He continued to compose without interruption. From 1907 he worked in Leipzig, where he was music director of the universityuntil 1908 and professor of composition at the conservatory until his death. In 1911 he moved to Meiningen where he got the position of Hofkapellmeister at the court of Georg II, Duke of Saxe-Meiningen. In 1915 he moved to Jena, commuting once a week to teach in Leipzig. He died in May 1916 on one of these trips of a heart attack at age 43.
He had also been active internationally as a conductor and pianist. Among his students were Joseph Haas, Sándor Jemnitz, Jaroslav Kvapil, Ruben Liljefors, George Szell and Cristòfor Taltabull.
Reger was the cousin of Hans von Koessler.