After six years in Prague as chaplain to the Holy Roman Emperor Ferdinand II from 1626 until 1632. However when the Swedish army attacked Prague, Saint-Vincent fled to Vienna leaving behind many of his important mathematical papers.
Pagkatapos ng anim na taon sa Prague bilang kapelyan sa Banal na Roman emperador Ferdinand II mula 1626 hanggang 1632. Subalit kapag ang Swedish hukbo attacked Prague, Saint-Vincent fled sa Vienna-alis sa likod ng maraming mga matematiko ng kanyang mahalagang papeles.