First came the return of conversation pits. Then came the resurgence of that other '70s-era seating mainstay — the ultra-comfortable, oft-squishy, sometimes-modular sofa, conceived by an array of (mostly) Italian designers, and built for conversation, intimacy, and that ephemeral but much sought-after quality of "conviviality." The trend only picked up steam during the pandemic, spurred by our collective desire to entertain at home. Now, alongside a slew of other sofa reissues throughout the industry, comes a Mario Bellini masterpiece back onto the market: The Le Mura sofa, first released in 1972 and reissued last year by Tacchini, will get its U.S. debut this week at the New York design gallery M2L, in a special presentation on view though March 27.