This stained glass panel from 1465 represent a donor from the Du Plessis family and St Vincent, is part of a four light window on the Ascension at St Taurin in Evreux France.
Patron saint of winemakers, was a Spanish martyr from the 3rd century. Legend is that his donkey eat the leaves of some vines and that those vines produced the best wine. He is supposed to have been killed by being roasted on a gridiron.
See "The Golden Legend" for the medieval life of saint Vincent.