Maxime Lalanne, Démolitions pour le percement du Boulevard St. Germain (Demolitions for the cutting of the Boulevard St. Germain), etching, 1862
The Herbert F. Johnson Museum of Art:
“Another important effect of the city’s medieval layout was the susceptibility of narrow streets to blockage by barricades during popular uprisings such as the July Revolution of 1830 and the Revolution of 1848. These influenced the widening of streets and the creation of new boulevards by Haussmann.”