Constantijn Huygens was a poet, composer and connoisseur of art and the classics. He was also secretary and confidant to three princes of Orange for 62 years. Hofwijck was also the place where Constantijn’s son Christiaan spent a significant part of his life. Christiaan Huygens was a member of the Royal Society of London for the Improvement of Natural Knowledge and became one of the greatest inventors and scientists. At the end of his life, at Hofwijck, he wrote Cosmotheoros, his magnum opus on the universe. At Huygens’s Hofwijck we look at the seventeenth century through the eyes of these two versatile men. With Constantijn and Christiaan, the story is about literature, art, music, politics, the House of Orange, science and life at a seventeenth-century country estate.