Brutalist architecture was predominantly employed for institutional structures because of its use of practical reinforced concrete and steel, modular features, and a utilitarian character. Imposing and angular, Brutalist structures have a visual character that contributes to their appeal today. They are known for their ability to withstand natural disasters. Brutalist architects included Mies van der Rohe, Le Corbusier, and Charles Eames. Their work is characterized by its minimalist design and emphasis on function over form. Institutions such as museums, libraries, and schools used Brutalist architecture because of its efficiency and durability. These structures often appear bleak and uninviting at first glance, but many find this appealing because they perceive it to be modern and industrial. Brutalist architecture has become popular again because of its effectiveness as urban planning and development tools. Modern versions of these buildings can be found in cities around the world.