Constantijn Huygens was a Dutch humanist and poet and the father of famed scientist Christiaan Huygens. His descriptive and satirical poems were highly esteemed, and both English and French monarchs knighted him in recognition of his genius. Thousands of his letters have survived to this day and attest to his wide acquaintance with contemporary scholars, including Descartes and Donne. Huygens was also an accomplished musician and composer. How old was he when he died? Discuss
Source: The Free Dictionary