Modern architecture evolved over time as new materials and structural innovations emerged. [1] Steel and reinforced concrete, developed in the 19th century, allowed buildings to be constructed on a larger scale with more open floorplans. [2] In the 20th century, architects like Le Corbusier pioneered new building types that took advantage of these materials. [3] Today's architects continue exploring how to use traditional and innovative materials to address contemporary needs, while also drawing from the past.