1. Beethoven’s Pupil and Friend: Ferdinand Ries was a close associate and student of Ludwig van Beethoven. He studied under Beethoven and even helped to premiere some of Beethoven's works. Their relationship significantly influenced Ries’s musical style, yet he managed to develop his own distinct voice.

2. Prolific Composer: Throughout his career, Ries composed an extensive body of work, including eight symphonies, several piano concertos, and a vast amount of chamber music. His compositions are noted for their lyrical melodies and dynamic contrasts, hallmarks of the early Romantic era.

3. Successful Career in London: Ries spent a significant portion of his career in London, where he was highly successful as both a composer and performer. He was a member of the Philharmonic Society and composed many works specifically for the London audience, contributing to his international reputation.

4. Memoirs of Beethoven: Along with Franz Wegeler, Ferdinand Ries co-authored a set of memoirs titled "Biographische Notizen über Ludwig van Beethoven," which provide valuable insights into Beethoven's life and character. These memoirs are considered important historical documents for understanding Beethoven's personal and professional life.

5. As Composer: Ries's compositions played a crucial role in the transition from Classical to Romantic music. His works, characterized by emotional depth and innovative structures, influenced many composers who followed, securing his place in the history of Western classical music.