Christen Købke (1810–48), influenced by Niels Laurits Høyen, an art historian who promoted a nationalistic approach calling for artists to search for subject matter in the folk life of their country instead of searching for themes in other countries such as Italy; Wilhelm Marstrand (1810–1873), a vastly productive artist who mastered a remarkable variety of genres, remembered especially for a number of his works which have become familiar signposts of Danish history and culture: scenes from the drawing-rooms and streets of Copenhagen during his younger days; the festivity and public life captured in Rome; the many representative portraits of citizens and innovators; even the monumentalist commissions for universities and the monarchy; and Martinus Rørbye (1803–1848), remembered for his genre paintings of Copenhagen, for his landscapes and for his architectural paintings, as well as for the many sketches he made during his travels to countries rarely explored at the time. Among other artists, C.A. Jensen (1792–1870) specialized almost exclusively in portraits.