Geometric sans-serif fonts were popular from the 1920s and 1930s due to their clean, modern design, and many new geometric designs and revivals have been created since. Notable geometric types of the period include Kabel, Semplicità, Bernhard Gothic, Nobel and Metro; more recent designs in the style include ITC Avant Garde, Brandon Grotesque, Gotham, Avenir, Product Sans and Century Gothic. Many geometric sans-serif alphabets of the period, such as those created by the Bauhaus art school (1919-1933) and modernist poster artists, were hand-lettered and not cut into metal type at the time.