Brutalism is an architectural style that emerged in the mid-20th century, characterized by its raw, unrefined materials, particularly concrete. Buildings in this style often feature bold geometric shapes and a lack of decorative elements, emphasizing functionality over aesthetics. The term "Brutalism" is derived from the French word "béton brut," meaning "raw concrete." This style gained popularity in the post-World War II era, as architects sought to create affordable housing and public buildings. Notable examples of Brutalist architecture include the Boston City Hall and the National Theatre in London. While often polarizing, Brutalism remains influential in contemporary design discussions.