"Первая симфония" (First Symphony) is a musical composition by Пётр Ильи́ч Чайко́вский, completed in 1866. This symphony is notable for its emotional depth and innovative orchestration, showcasing the composer's ability to blend classical forms with romantic expression. It consists of four movements, each contributing to the overall narrative and mood of the piece. The symphony premiered in 1868 in Moscow and received mixed reviews initially. Over time, it has become one of Чайко́вский's most performed works, celebrated for its lyrical melodies and rich harmonies. The piece reflects the composer's personal struggles and triumphs, making it a significant work in the symphonic repertoire.