Thingvellir (1897) by the British painter William Collingwood (1819-1903). Collingwood was a well known watercolor landscape painter and depicted here the Althing (Alþingi) in medieval Iceland, which was probably the oldest parliament in Europe. I think that it’s intentional how people and tents are integrated into the landscape, so that this archaic democratic tradition becomes part of it.
History painting dates back to the Renaissance and was long considered to be the "grand genre". Nevertheless it has its peak in the 19th century forged by Neoclassicism and Romanticism. There it became the artistic contribution in the process of the construction of National Identities of the European and American nations.
At the same time history painting under the influence of historism pretended to be "realistic", to show history how it has been. Above all it was this pretension that led to the great failure of History painting AND Realism at the end of the century.
When artists and their public realized that telling history always will be subjective and a painting will always be an illusion Realism and history painting lost their ground to modern painting.