1647 (MDCXLVII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1647th year of the Common Era (CE) and Anno Domini (AD) designations, the 647th year of the 2nd millennium, the 47th year of the 17th century, and the 8th year of the 1640s decade. As of the start of 1647, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
Louis Fuzelier was a French playwright.
José de Armendáriz y Perurena, 1st Marquis of Castelfuerte was a Spanish soldier and colonial administrator. From May 14, 1724 to February 4, 1736 he was viceroy of Peru.