The Symphony No. 102 in B♭ major, Hoboken I/102, is the tenth of the twelve London symphonies written by Joseph Haydn, at the instigation of impresario Johann Peter Salomon. It is one of three symphonies he worked on in 1794, along with his 103 and 104th symphonies. Despite being lesser-known than many of the other works in the group, it is sometimes viewed as Haydn's best symphony, in terms of successful use of compositional strengths unified in a quality undisturbed throughout the work.
It was completed in the summer of 1794, and premiered at benefit concerts at the King's Theatre in May 1795. It is now believed by many scholars to be the symphony at the premiere of which a chandelier fell from the ceiling of the concert hall in which it was performed. The audience escaped unharmed, supposedly because they had rushed the stage. It was long believed that this "miracle" event took place at the premiere of his Symphony No. 96, which had happened in 1791.
The second movement is an orchestration of the second movement of the F♯ minor piano trio, Hob. XV/26, transposed from F♯ major to F major. The repeats in the trio are written out in the symphony, allowing for changes in the orchestration the second time through. The orchestral version also features a rolling triplet accompaniment in the cellos where in the trio the cello simply doubles the piano's bass line.