In Denmark’s second-largest city, a former industrial harbor—now redeveloped as a mixed-use district— hosts a roughly 260-foot-tall building that confronts one of architecture’s hardest questions: can the high-rise, arguably the most carbon-intensive urban typology, be rethought as a circular, low-emissions system? Recently completed, TRÆ is now recognized as the nation’s tallest timber structure, with mass timber at the heart of a broader experiment in material reuse and construction logistics across its approximately 3.62-acre development. The project is conceived as a prototype for how dense urban construction might reduce its dependence on carbon-intensive materials. The name is the brief. In Danish, træ means tree, timber, and three. …T1 reaches 256 feet and is joined by two six-story volumes. All are structured with cross-laminated timber (CLT) slabs and glulam columns anchored by concrete cores. The hybrid system balances timber ambition with structural and regulatory demands.