Historical Events Dec 1 Germany promises Poland aid against Sweden Dec 14 Artificial pearls 1st manufactured by M. Jacquin in Paris made of gypsum pellets covered with fish scales Pendulum Clock Dec 25 Dutch astronomer and mathematician Christiaan Huygens creates the first pendulum clock Astronomer, Mathematician and Scientist Christiaan Huygens Events in 1656 Nov 1656 History by Year Jan 1657 Famous Living People by Age 20-29 30-39 40-49 50-59 80-89 Over 90