So many odd things in this painting (throwing money into the river where people are taking a dump?) but it was what looks like a glory hole scene going on (upper left corner of the detail) that caught my eye.
Painting by Pieter Bruegel and detail
MATTHEW'S ISLAND
MATTHEW'S ISLAND 
It is called ”Netherlandish Proverbs” (Dutch: Nederlandse Spreekwoorden; also called Flemish Proverbs, The Blue Cloak or The Topsy Turvy World) which is a 1559 oil-on-oak-panel painting.
According to wiki (https://en.wikipedia.org/wiki/Netherlandish_Proverbs) – There are approximately 126 identifiable proverbs and idioms in the scene, although Bruegel may have included others which cannot be determined because of the language change. Some of those incorporated in the painting are still in popular use, for instance “Swimming against the tide”, “Banging one’s head against a brick wall” and “Armed to the teeth”. Many more have faded from use, which makes analysis of the painting harder. “Having one’s roof tiled with tarts”, for example, which meant to have an abundance of everything.
The glory hole thing is “To kiss the ring of the door” meaning to be obsequious !!! LOL !!!
Thanks for all the information. I did not know that all these weird little scenes in this paintings were depictions of proverbs and idioms, I just thought Bruegel must’ve gotten a touch of lead poisoning from drinking out of pewter cups or found some magic mushrooms growing in a field.