The Weaver building was a flour mill and corn storage building in the North Dock of Swansea, Wales.
The structure was built by French engineer Francois Hennebique in 1897 and was the first reinforced concrete building in Europe. The Weaver building survived World War II bombings in 1941, but was demolished in 1984 to make way for a new Sainsbury's superstore that now stands on the site.