Art and the Transformations of the 19th century

Here are some paintings from the 19th century.

The first two are by Claude Monet, and they are of the Gare Saint-Lazare train station in Paris, which opened in 1837.

The next three paintings are by another French painter, Gustave Caillebotte.

Right now you can visit an exhibition of Caillebotte's paintings in the Museo Thyssen!

And here is another painting from that time, by Jean Francois Millet:

and another by Jules Breton:

What can we learn from these paintings about the transformations in society during the 19th century????