Jamieson and Spearl was a St. Louis, Missouri architectural firm that designed most of the buildings built at Washington University at St. Louis and the University of Missouri between 1912 and 1950.
James Paterson Jamieson (1867-1941) was born in Falkirk, Scotland. He studied for two years at the School of the South Kensington Museum and then emigrated to the U.S. in 1884 and spent two years with a firm in Minneapolis, Minnesota. He then joined his brother Thomas Paterson Jamieson in an architectural practice R.G. Kennedy. In 1889 he served as a draftsman at Cope and Stewardson. He received the first University of Pennsylvania Traveling Scholarship to study in Europe at the Victoria and Albert Museum.
He was sent to St. Louis to supervise the construction of the firm's design of buildings at Washington University's hilltop campus in preparation for the 1904 St. Louis World's Fair.
After Cope's death in 1902 he returned to Philadelphia but continued to maintain a practice in St. Louis. In 1912 he formed his own practice was joined in 1918 by George Spearl (died 1948), another Scottish born Cope alumni.
The firm continued to operate into the 1950s after the death of its principals.
Among the 20 buildings at the University of Missouri are: