The brothers behind Leong Leong Architecture—Chris, 33, and Dominic, 32—have received great attention from their peers—they won the New Practices award from the American Institute of Architects in 2010—and the fashion industry alike, collaborating with Opening Ceremony, Siki Im, and 3.1 Phillip Lim to create the spaces that help define those brands. Their most recent building, 3.1 Phillip Lim’s flagship store in South Korea, is their second project with the fashion designer (the 3.1 Phillip Lim shop in Los Angeles is also a Leong Leong design), who asked the brothers to share their thoughts on Ellsworth Kelly, the meeting place of fashion and architecture, and what should be done about Penn Station.