In more recent decades, the collection has expanded to include several hundred works, from throughout the development of 20th century abstraction in Canada. The selection includes works by early movements, such as Les Automatistes and Painters Eleven, and contemporary figures in non-objective painting, such as David Urban and Ric Evans. Other artists noted in gallery materials include Harold Town, Jack Bush, Claude Tousignant, Guido Molinari, Ron Martin, Chris Cran, William Ronald, John Meredith, and Ronald Bloore; the final three in the list were once Brampton residents.