Brutalism was an architectural movement that was popular in the 1950s through the 1970s. The movement was initiated by French architect Charles-Edouard Jeanneret-Gris, known more popularly as Le Corbusier. The Brutalist approach was marked by an unashamed display of building functions and construction using poured concrete in a way that did not disguise the rough materials with which buildings are made. Brutalism completely rejected the classical norms of beautification and decoration for hard angles, rough surfaces, and exposed plumbing and machinery. I like Brutalism for its geometric flow and confrontational style.
My first conscious encounter with Brutalism was the Bigelow-Rice Building on the campus of my undergraduate school, Ohio Wesleyan University. It has a blunt character in its blocky slabs of poured and raked concrete.
This building is a Christian Science Church in Washington, D.C. Very pretty, in my opinion. The owners, however, disagree and want to tear it down to build a new building. However, historic preservationists want to force the Christian Scientists to keep their old building, leading to a lengthy legal battle.
Brutalism was particularly popular for institutional buildings, such as schools, libraries, government facilities, and churches. This is one of the many Brutalist libraries across the U.S. -- the Orlando Public Library. Its blunt styling makes me think of street gangs of librarians daring any passerby to start a fight.