Political imagery is one powerful dimension of the political cultures of the period. There are various sites for images but this page lists a few we have found most helpful.
See also: Napoleon in Caricature: A Collection of caricatures from Britain, France, Russia, the low countries, Spain etc., responding to Napoleon Bonaparte and the European wars of 1797-1815 held at the Bodleian library and digitized and catalogued in two projects between 2000-2005, with the support of the Mellon Art Fund, under the direction of Mark Philp and Alexandra Franklin.
There is an extensive collection of images in the Harvard Art Gallery, including prints by :
See also, for further Daumier prints
Re-imagining Democracy 