text: Worcester would also claim many inventions and firsts. New England Candlepin bowling was invented in Worcester by Justin White in 1879. Esther Howland began the first line of Valentine's Day cards from her Worcester home in 1847. Loring Coes invented the first monkey wrench and Russell Hawes created the first envelope folding machine. On June 12, 1880, Lee Richmond pitched the first perfect game in Major league baseball history for the Worcester Ruby Legs at the Worcester Agricultural Fairgrounds. The first three-decker homes were built by Francis Gallagher (1830–1911) in Worcester.
  Urban changes and recovery
  After World War II, Worcester began to fall into decline as the city lost its manufacturing base to cheaper alternatives across the country and overseas. Worcester felt the national trends of movement away from historic urban centers. The city's population dropped over 20% from 1950 to 1980. In the mid-20th century, large urban renewal projects were undertaken to try to reverse the city's decline. A huge area of downtown Worcester was demolished for new office towers and the  Worcester Center Galleria shopping mall. After only 30 years, the Galleria would lose most of its major tenants and its appeal to more suburban shopping malls around Worcester County.