Sir Frederick Mappin Building, Sheffield

The Sir Frederick Mappin Building, commonly known as the Mappin Building, is a prominent structure within the University of Sheffield's complex, fronting onto Mappin Street. This street, previously known as Charlotte Street, and the building itself are named in honor of Sir Frederick Mappin (1821–1910), who is recognized as the "Father of Sheffield University."

Located within the Saint George's Complex, named after the nearby Saint George's Church also owned by the University, the Mappin Building is primarily occupied by the Faculty of Engineering and Saint George's IT Centre. Historically, its south wing also housed the Department of Geology until its closure in 1990.

The oldest section of the building, located centrally, is the former Technical School, which was the first purpose-built facility for what would later become the University of Sheffield. Designed by the architectural firm Flockton & Gibbs, it was completed in 1886. The Mappin Building's prominent Mappin Street frontage, also designed by Flockton & Gibbs, showcases a more elaborate architectural style. Construction of this part began in 1902, following the demolition of the former Grammar School, and was completed in 1913. This frontage features the main entrance, the John Carr Library, and Mappin Hall, connected to the original Technical School by a bridge.

Additionally, parts of the northern range along Broad Lane and a building situated behind the Technical School were completed later, in 1955, further expanding the complex.