Doyle became a sculptor of marble and bronze monuments of historical figures including Civil War participants and other prominent persons.
His work can be found throughout the United States including in Washington, D.C., Missouri, Alabama, New York, Ohio, Indiana, Georgia, and Mississippi.
According to Leonard V. Huber, author of New Orleans Architecture: The Cemeteries, Doyle's finest work is "Calling the Roll" (1885), a marble sculpture of an unknown Confederate soldier.
A Doyle marble statue of Margaret Haughery, a New Orleans woman who devoted her life to the poor, was erected in 1889, the first monument to honor a female philanthropist in the United States.
[citation needed] The "Alexander Doyle Papers, 1852-1937" are located in the Smithsonian Institution’s Archives of American Art in Washington D.C.[2]