HOUSTON, TX.- Cornelia Long, chair of the Board of Trustees of the Museum of Fine Arts, Houston, announced at yesterdays annual meeting of the board that the MFAH has selected three architecture firmsMorphosis, Snøhetta and Steven Holl Architectsto submit conceptual design proposals for an expanded MFAH. The project entails the construction of a building intended primarily for post-1900 art, a parking garage and the integration of surrounding MFAH buildings and public spaces. The decision follows several years of focused internal discussion to assess the museums future needs, and a year-long series of interviews with 10 international architecture firms. This decision marks an important step forward for the future MFAH, said Richard D.