Ferdinand Augustin Hallerstein

Ferdinand Augustin Haller von Hallerstein (Slovene: Ferdinand Avguštin Haller von Hallerstein; 27 August 1703 – 29 October 1774), also known as August Allerstein or by his Chinese name Liu Songling (simplified Chinese: 刘松龄; traditional Chinese: 劉松齡; pinyin: Liú Sōnglíng), was a Jesuit missionary and astronomer from Carniola (then Habsburg monarchy, now Slovenia). He was active in 18th-century China and spent 35 years at the imperial court of the Qianlong Emperor as the head of the Imperial Astronomical Bureau and Board of Mathematics.

Source: Wikipedia — Ferdinand Augustin Hallerstein (CC BY-SA 4.0)