(bapt. Laufen, nr. Salzburg, 11 Dec. 1654; d Vienna, 25 Oct. 1730).
Austrian painter who stands at the beginning of the great tradition of Baroque and Rococo decoration in the Austro-Hungarian empire. From 1675 to 1687 he lived in Venice as the pupil and assistant of Johann Carl Loth (1632–98), a painter from Munich whose studio attracted many German and Austrian artists who visited Italy. After he returned to Austria, Rottmayr lived first in Salzburg, then from about 1696 in Vienna, although he undertook commissions in various other places, including Melk, where he carried out extensive work at the great abbey church, built in 1702–14. Although primarily famous for his frescos, Rottmayr also painted easel pictures. His vigorous, colourful style was strongly influenced by Rubens, and he followed Rubens's practice of making oil sketches in preparation for his major works.