Biography of Juan Adán Schall (1591-1659)

German Jesuit, missionary in China; He was born in Cologne in 1591 and died in 1659. The Court of China was commissioned to form the imperial calendar; at the time of the Emperor Chun-Tchi, he was appointed director of celestial Affairs Office Adviser, master of the subtle doctrines, and presided at the Foundry of artillery when the invasion of the Tatars took place in 1636. His zeal for the propagation of the faith was almost killed. He left several works of mathematics written in Chinese.