Karol Szymanowski was a Polish composer of tremendous sophistication, working in the early-to-mid 20th century. King Roger, his operatic masterpiece, explores spirituality and art through a complex narrative that unfolds across three acts. The Symphony No. 4 (Sinfonia Concertante) continues similar themes through instrumental means. Sir Simon Rattle's 1999 EMI recording captures both the lyrical beauty and the philosophical ambition. Szymanowski's harmonic language is richly chromatic, influenced by impressionism but distinctly Central European. This music rewards patient listening; it doesn't give up its secrets immediately but repays attention with extraordinary depth. A genuine masterwork from an underrepresented composer.