ArtsWestchester's Triennial The Hudson River Valley has long been a source of inspiration to artists and a hub of creative activity. The ArtsWestchester Triennial showcases the vanguard of the region’s arts community, offering a snapshot of what’s now and what’s new in contemporary visual art. This year’s inaugural Triennial features work by 15 Hudson Valley artists and will coincide with the celebration of ArtsWestchester’s 20th year in its historic downtown White Plains building.