Everything in this room is still: the bread, the basket, the nail in the wall. The only thing happening is a thin stream of milk, and she is watching it as carefully as you are. Now look at the bread. Vermeer built its crust from hundreds of tiny dots of paint — the museum counts them as points of light.
On the floor by the wall is a small wooden box with coals inside: a foot warmer, ordinary in a Dutch kitchen in 1660. The room is bare on purpose. Vermeer painted over a wall map and a basket of laundry to leave her alone with the light.
A whole painting about one pour of milk — and it has been pouring for three hundred and sixty years.
The painted-over map and laundry basket are reported in the Rijksmuseum’s research on the painting; the foot warmer and the dotted highlights are in the collection description.