Johnston Marklee have won plaudits for their houses and they have now triumphed over several larger firms for a coveted commission: the Menil Drawing Institute (MDI) in Houston. The late Dominique de Menil had refined taste and great wealth—a rare combination—and she patiently sought very best in art and architecture. The main museum, which opened in 1987, is still Renzo Piano's best—for its springy grace and luminous interiors. She established a leafy campus around that building, preserved a row of old houses to accommodate visiting artists, and created several satellite galleries, including Piano's understated shrine to Cy Twombly. For its future growth, the board commissioned a master plan from David Chipperfield, which will replace three massive apartment blocks with new housing and the MDI.