The John Hancock Tower, colloquially known as the Hancock, is a 60-story, 790-foot (240 m) skyscraper in the Back Bay neighborhood of downtown Boston. The first and largest cross-laminated timber (CLT) academic building in the US has opened at the University of Massachusetts (UMass) Amherst.In 2017, Leers Weinzapfel Associates constructed a building completely out of timber at the University of Massachusetts Amherst. Ascent is a 25 storey building and when complete, is set to be the tallest timber building in the world. A fivestory mixeduse structure in Roxbury represents a new kind of netzeroenergy building, made from wood. The tallest mass timber structure in the world upon completion, Ascent rises 25 stories in Milwaukee.