Where would you find pictures of the inside of a house in 1666?

Picture of Inside a House 1666

Since the camera was developed in the mid-1800s there won't be any photographs, of course.

You will need to find paintings or sketches. Try browsing the art of famous 17th century artists. Jan Vermeer is one who did interior scenes.

Addition:

Pieter de Hooch might be more rewarding. He usually shows more of the interiors, whereas Vermeer concentrates on the people.