The Birmingham Triennial Musical Festival, in Birmingham, England, founded in 1784, was the longest-running classical music festival of its kind. Its last performance was in 1912.

History
In 1837 Felix Mendelssohn conducted a performance of his St Paul oratorio, played the organ, and played the piano part in the premiere of his second piano concerto, specially commissioned by the Festival. He appeared in the following festival, playing his first piano concerto.
For the 1846 festival he composed and conducted the premiere of his oratorio Elijah, another new work commissioned by the Festival. He was paid 200 guineas. Elijah was played at every successive festival. Mendelssohn died a year later.