Crittall Windows Ltd is a notable English manufacturer of steel-framed windows, today based in Witham, Essex, close to its historic roots in the county. Its products have been used in thousands of buildings across the United Kingdom, including the Houses of Parliament and Tower of London, and are features particularly associated with the Art Deco and Modernist movements in early 20th-century architecture. The company's windows are also used in numerous buildings in North America and other parts of Europe, and were a feature of the RMS Titanic.