Darcelle XV Plaza (formerly O'Bryant Square)[1] is a square that was a small park and fountain at the intersection of Southwest Park Avenue and Southwest Harvey Milk Street in downtown Portland, Oregon, in the United States.

[5] Aaron Mesh, writing for Willamette Week on an article discussing plans for a park space in Northwest District described city's reluctance to commit to a plaza because "junkie haven O'Bryant Square, or "Paranoid Park"—have been a security hassle.

[7] In 1971, the property was donated to the city by Mr. and Mrs. William E. Roberts,[8] having once contained a quarter-block building and surface parking.

[10] The park was popular in both the business and planning communities[9] and in 1976, received a national design award from the United States Department of Housing and Urban Development.

[12] In March 2018, the park was closed indefinitely by the City of Portland, citing safety concerns related to structural issues in the underground parking garage.