Critical regionalism is an architectural approach that counters placelessness in modern architecture by incorporating contextual forces to give a sense of place and meaning. It was first defined by Alexander Tzonis and Liane Lefaivre, and further developed by Kenneth Frampton. Critical regionalism adopts modern architecture's progressive qualities but also values responses particular to the local context, with emphasis on elements like climate, topography, and materials rather than visual styles. It differs from regionalism by consciously engaging with universal principles rather than directly copying vernacular architecture. Examples of critical regionalism include works by Alvar Aalto, Jørn Utzon, and other architects who mediated universal and local influences.