Dutch, French, Latin, Greek, Italian, English, Spanish, and German: those are the eight languages in which Dutch Golden Age poet Constantijn Huygens (1596—1687) wrote his poetry and correspondence. He also knew a bit of Hebrew and Portuguese. Examining awide range of Huygens's writings ‘including personal letters, state correspondence, and poetry’ Christopher Joby explores how Huygens tested the boundaries of language with his virtuosity as a polyglot. From Huygens's multilingual code switching to his writings on architecture, music, and natural science, this comprehensive account is a must-read for anyone interested in this Dutch statesman and man of letters.