Servant of God Xu Guangqi

Xu Guangqi or Hsü Kuang-ch'i (April 24, 1562 – November 8, 1633), also known by his baptismal name Paul or Paul Siu, was a Chinese agronomist, astronomer, mathematician, politician, and writer during the late Ming dynasty. Xu was appointed by the Chinese Emperor in 1629 to be the leader of the Shixian calendar reform, which he embarked on with the assistance of Jesuits. Xu was a colleague and collaborator of the Italian Jesuits Matteo Ricci and Sabatino de Ursis and assisted their translation of several classic Western texts into Chinese, including part of Euclid's Elements. He was also the author of the Nong Zheng Quan Shu, a treatise on agriculture. He is one of the "Three Pillars of Chinese Catholicism". The Roman Catholic Church considers him a Servant of God, one of the stages towards formal sainthood. On April 15, 2011, Vatican spokesman Federico Lombardi announced the start of a beatification process for Xu Guangqi, which has stalled. Xu Guangqi is the pinyin romanization of the Mandarin Chinese pronunciation of Xu's Chinese name. His name is written Hsü Kuang-ch‘i using the Wade–Giles system. His courtesy name was Zixian and his penname was Xuanhu. In the Jesuits' records, it is the last which is used as his Chinese name, in the form "Siù Hsven Hú". At his conversion, he adopted the baptismal name Paul (Latin: Paulus). In Chinese, its transcription is employed as a kind of courtesy name (i.e., Xu Baolu) and the Jesuits sometimes referred to him as "Siù Pao Lò" or Ciù Paulus. More often, however, they describe him as "Doctor Paul" (Latin: Doctor Paulus; Portuguese: Doutor Paulo), "Our Paul" (Latin: noster Paulus), or "Paul Siu" or "Ciu". Xu Guangqi was born in Shanghai in Southern Zhili's Songjiang Prefecture on April 24, 1562, under China's Ming dynasty. At the time, Shanghai was merely a small walled county seat in the old quarter around the present city's Yu Garden.