Lahdelma & Mahlamäki architects is an internationally recognized architecture office based in Helsinki, Finland. It has a long history of designing since the founders, Ilmari Lahdelma ja Rainer Mahlamäki, began working together already in the 1980s. Lahdelma & Mahlamäki architects’ central works from recent years include, e.g., Museum of the History of Polish Jews in Warsaw, Poland and Helsinki-based projects Metropolia University of Applied Sciences campus, Urban Environment House and Trigoni high-rise project.