Maison Ciel (하늘집) is a private residence designed by iSM-Architects 아이에스엠 건축연구소(URL). It was designed by Joongwon Lee (이중원) and Kyung-A Lee (이경아), constructed by Dasan Construction and Engineering, and photographed by Hyosook Chin (진효숙). Maison Ciel was completed in 2014. Joongwon Lee and Kyung-A Lee are MIT graduated architects practicing in Seoul, Korea.