Portland Art Museum Main Building, Museum building in downtown Portland, United States.

The Portland Art Museum Main Building is a museum building in downtown Portland housing extensive gallery spaces for displaying artwork. The building contains over 42,000 art objects throughout its galleries.

The structure was designed by Pietro Belluschi as a modernist building and opened on November 18, 1932, at the corner of SW Park Avenue and Jefferson Street. It marked an important moment in Portland's architectural development.

The building houses Native American art alongside works by European masters and Asian pieces, creating a mix of different artistic traditions for visitors to explore. An outdoor sculpture garden opens to the public and invites people to walk through its collection.

The museum offers free admission certain evenings and once monthly, and has a research library with a large collection available to visitors. Those planning a visit should check accessibility details and opening hours in advance.

The 1932 building's exterior is clad in pinkish-gray Alaskan marble; Belluschi's design was chosen through a national competition held in 1929. The Mark Rothko Pavilion, designed by Vinci Hamp Architects with Hennebery Eddy, connects the Main Building to the Mark Building across SW 10th Avenue.