This painting can be regarded as David's finest work, in which he has perfectly succeeded in immortalizing a contemporary political event as an image of social ideals. David's painting of Marat represents the peak of his involvement in the Revolution where invention, style, fervent belief and devotion combine to produce one of the most perfect examples of political painting. David presented the painting to the Convention on 14 November 1793.
Jean-Paul Marat saw himself as a friend of the people, he was a doctor of medicine and a physicist, and above all he was editor of the news-sheet Ami du peuple. He suffered from a skin disease and had to perform his business for the revolution in a soothing bath. This is where David shows him, in the moment after the pernicious murder by Charlotte Corday, a supporter of the aristocracy. David had seen his fellow party member and friend the day before. Under the impact of their personal friendship David created his painting "as if in a trance," as one of his pupils later reported.