Italian Interior, by Jean-Honoré Fragonard in 1760. This piece shows the warmth and security that were becoming more common in households with the growing economic power of the Middle Class.
Reunion en plein air (Meeting in the Open Air), by Jean-Antoine Watteau. The reason this picture stands out to me as showing the economical groth of the middle class is the way everyone is dressed for a casual small gathering. It shows that even at these low eventful times of the day, people wore somewhat lavish clothings.