The Good Samaritan Window, Chartres Cathedral
The Good Samaritan Window is located in the south aisle of the nave of the Cathedral Notre-Dame de Chartres in Chartres, France. == Trade Windows == Trade windows first appeared at the cathedrals of Chartres and Bourges between 1200 and 1210.
Source: Wikipedia — The Good Samaritan Window, Chartres Cathedral (CC BY-SA 4.0)