This circa-1948 International Style three-bedroom was designed and inhabited by Norman and Jean Fletcher, two founding members of The Architects Collaborative, or TAC, which was started in 1945 when Bauhaus mainstay Walter Gropius teamed up with a group of young architects. The very rectangular 3,400-square-foot abode is part of the planned community of Six Moon Hill in Lexington, Mass., an early TAC pursuit that saw most of the founding partners (Gropius excluded) building houses and starting families on 20 bucolic acres they bought together. The Fletcher residence, which was last sold in 2013 for $1.34M, has the same flat roof, vertical wood siding, and walls of glass shared by the original Six Moon Hill homes, and also shares their communal commitment to keeping bedrooms small and shared spaces expansive. Back in 2004, one resident told the Boston Globe that "things have changed since the '50s and '60s, when everyone was running in and out of everyone's houses." But at least a decade ago, the socialist spirit of the place lived on in "great community traditions, like snowstorm parties." The ask, for admittance into this Bauhaus-inspired American experiment? $1.398M.