Witz, Conrad- The Altarpiece of Saint Peter, (German, active in Switzerland, approx. 1400-1446)1 Conrad Witz

The picture has something of this: people, woman, landscape, water, river, temple, mountain, lake, saint, lithograph, monastery, transportation system.
Perhaps it’s a painting of a woman in a red dress standing in front of a boat with a group of people on it and a mountain in the background.