Matteo Ricci
Born in Lecce, Apulia, Sabatino de Ursis arrived in 1607 in Beijing, in order to help Matteo Ricci with astronomical research. He also worked together with Xú Guāngqĭ and Matteo Ricci on the translation of Euclid's "Elements" into Chinese, and with Ricci on the "Zhifang waiji", China's first global atlas.