In 1954, Mercury embarked on one of the most ambitious projects ever undertaken by a classical label. It set about recording Tchaikovsky's 1812 Overture, using the original score for symphony orchestra augmented by church bells, cannon and brass choir. The work was recorded in three different locations. The musical score was taped by the Minneapolis Symphony conducted by Antal Dorati in Northrop Auditorium; the pealing of Kremlin bells was re-created by the bells of the Harkness Memorial Tower on the campus of Yale University; and an authentic Napoleon-era (1761) cannon was recorded at the U.S. Military Academy at West Point. The final 'effects' tapes of cannon and bells were then played in synchronization with the edited musical performance to produce the master tape.