Circle of Master of Liesborn – Saints Gregory, Maurice and Augustine Part 1 National Gallery UK

The picture has something of this: people, costume, sword, man, prince, traditional, culture, dress, narrative, cross, gold, festival, princess, woman, wear, celebration, act, saint.
Perhaps it’s a painting of a group of men standing next to each other in front of a building with arches and arches on either side of the men are holding flags.