The auditorium building occupies an entire city block in downtown Portland, specifically the block bounded by Third and Second Avenues and Clay and Market Streets.
It was constructed in 1916–17, but an extensive remodeling and modernization in 1967–68 effectively changed its appearance beyond recognition.
It was originally known as the Public Auditorium, or alternatively as the Municipal Auditorium.
 The facility's formal opening and dedication took place on July 4, 1917, and the first full concert took place the following day, with what was dubbed the first annual Portland "Music Festival", featuring the Portland Symphony Orchestra (now the Oregon Symphony).

Another longtime tenant of the auditorium building was the Oregon Historical Society, whose headquarters and museum were located in the building for almost five decades.
 The society moved from the Tourny Building in 1917, occupying space on the second and third floors.
 In the early 1960s, the historical society approved plans to build a new facility for its exhibits, archives, research facilities and offices.
 The museum in the auditorium closed permanently in June 1965, with the exhibits thereafter being moved to temporary storage until completion of the new museum, which opened in fall 1966.

In November 1964, the city's voters approved a ballot measure that sought funding for a $3.9 million rebuilding of the auditorium.

In 1967–68, by which time it had been renamed Civic Auditorium, the building underwent an extensive remodeling, which included replacement of its entire original exterior with a new modern-style exterior, at a cost of $4 million.
 It reopened in May 1968.
 Of the old structure, only 17 percent was salvaged as part of the remodeling, comprising mainly the north and south walls.
The auditorium building occupies an entire city block in downtown Portland, specifically the block bounded by Third and Second Avenues and Clay and Market Streets. It was constructed in 1916–17, but an extensive remodeling and modernization in 1967–68 effectively changed its appearance beyond recognition. It was originally known as the Public Auditorium, or alternatively as the Municipal Auditorium.  The facility's formal opening and dedication took place on July 4, 1917, and the first full concert took place the following day, with what was dubbed the first annual Portland "Music Festival", featuring the Portland Symphony Orchestra (now the Oregon Symphony).
Another longtime tenant of the auditorium building was the Oregon Historical Society, whose headquarters and museum were located in the building for almost five decades.  The society moved from the Tourny Building in 1917, occupying space on the second and third floors.  In the early 1960s, the historical society approved plans to build a new facility for its exhibits, archives, research facilities and offices.  The museum in the auditorium closed permanently in June 1965, with the exhibits thereafter being moved to temporary storage until completion of the new museum, which opened in fall 1966.
In November 1964, the city's voters approved a ballot measure that sought funding for a $3.9 million rebuilding of the auditorium.
In 1967–68, by which time it had been renamed Civic Auditorium, the building underwent an extensive remodeling, which included replacement of its entire original exterior with a new modern-style exterior, at a cost of $4 million.  It reopened in May 1968.  Of the old structure, only 17 percent was salvaged as part of the remodeling, comprising mainly the north and south walls.
Keller Auditorium