Converge 45 returns to Portland with more than 50 projects at 15 venues across the city

The painting, which featured prominently in a recent Colescott retrospective, hammered slightly below its estimate

Bonhams is offering a Robert Colescott work in a single-lot sale, while Sotheby’s online fashion series includes Princess Diana’s famous black-sheep sweater

"1919" is among Colescott’s most important works, according to Bonhams, and figured prominently in a recent touring retrospective

The Arkansas-based non-profit was founded by Walmart heiress Alice Walton

The late artist’s first major retrospective chronicles his development from early, muted works to the riotous paintings for which he became famous

The painting's low estimate of $9m is ten times the artist's record at auction