Swan Lake may be the most iconic ballet in history. But despite its success today, the creation of Swan Lake in 19th-century Russia was far from smooth-sailing. For one, Tchaikovsky bristled at the idea of being labeled a “ballet specialist” like Ludwig Minkus, who would compose bars of music to spec: 8 bars of “happy” music for an entrance, or 16 bars of “dramatic” music for a finale, depending on the choreographer’s needs. Plus, the premiere of the ballet in Moscow was deemed a critical failure. Among all the challenges associated with its debut, how did this ballet find its wings and soar to success?