John E. Tourtellotte was a Boise architect whose company J.E. Tourtellotte & Co. designed many historic buildings in Boise and the Northwest. He later formed a partnership with architect Charles Hummel.
The work of both John F. Tourtellotte and Charles F. Hummel are numerous throughout the Treasure Valley. A complete listing of their structures in the national Register of Historic Places can be found here http://www.nationalregisterofhistoricplaces.com/ID/Ada/state.html Image of University of Idaho Administration building by Jimmy Emerson, and used under a Creative Commons license.
Tourtellotte's Boise Buildings
For more information on the architecture of Tourtellotte & Hummel, check out th book Tourtellotte & Hummel of Idaho: The Standard Practice of Archiecture by Patricia Wright and Lisa B. Reitzes (Logan, UT: Utah State University Press, 1987).