La fée électricité by Raoul Dufy is a huge painting (624 square meter) that you can see at the Paris Museum of Modern Art in the Palais de Tokyo (free entrance). The paintor made this incredible painting for the International Exhibition of Arts and Technology of 1937 representing Electricity through the centuries. If you enlarge the picture (click on it) you can see a person behind the sign "Marcel" that gives an idea of the size of the painting.
It has been a long time since I haven't visited this museum since I am not found of the Palais de Tokyo which is still in a poor condition but I had friends from Orleans at home and it is still worth seen it when you visit Paris. If you come by métro you should stop at Iena station and walk down to the museum. That is where you've got this great view on the Eiffel Tower that Virginiaand I both posted.