Mackintosh, Charles Rennie (1868-1928), was an influential Scottish architect and designer. Mackintosh was a leader in the modern art movement called Art Nouveau, which flourished from the 1890's to about 1910. However, Mackintosh developed a personal style in his buildings and interior designs that had a strong influence on modern architects of the early 1900's, especially those in Austria and Germany. In his own country, Mackintosh gained only limited recognition, and few of his building projects were ever finished. He was almost forgotten following his death, but interest in his work revived during the late 1900's.