In many ways it is difficult to compare styles across multiple art forms. It is particularly complex in the case of the baroque, as it was an international movement spanning verbal, visual, and aural realms. In most genres, the baroque is characterized by proliferation of ornament combined with direct (as opposed to complexly symbolic or allegorical) representation and a combination of structural symmetry, elaboration, and movement. Visually typical are the use of domes in architecture and chiaroscuro. Caravaggio, Rembrandt, Rubens, and Bernini are considered baroque artists. In music, counterpoint and harmony were extremely important. Although many great composers worked in this period (Bach, Handel, Vivaldi, Telemann), perhaps the most characteristic works in sheer technical virtuosity are those of Bach, especially The Art of the Fugue and the Brandenburg Concertos.