Modern architecture began in the early 20th century as architects sought to reconcile design principles with rapid technological advancement through simplification of form and subtraction of ornamentation. Some key architectural styles that emerged during this period included Organic Architecture championed by Frank Lloyd Wright which promoted harmony with nature, Art Deco with its linear symmetry and inspiration from ancient cultures in the 1920s-30s, and the International Style of the 1920s-30s characterized by efficiency over decoration with glass curtain walls and right angles. Mid-Century Modern of the 1930s-60s combined elements of earlier styles like Art Deco with simplicity, and Postmodern Architecture emerging in the late 1970s rejected modernism's simplicity and instead embraced diverse, sometimes coll