Many structures have been replaced since 1974 as part of MIU's master plan for reconstruction and expansion which includes careful attention to environmental conservation, incorporating renewable energy, state-of-the-art building technologies, natural building materials and Maharishi Sthapatya Veda principles of architecture. Two golden domes were erected between 1980 and 1981 and are used for daily group practice of the Transcendental Meditation and the TM-Sidhi program and have been called "particle accelerators of consciousness" by the university's founder. The campus was "thoroughly rebuilt" in the 1990s and seven student residence halls, with single rooms, were completed in 2005 using eco-friendly designs, natural materials and geo-thermal heating. By 2007, the university had over 45 campus buildings, including 17 classroom and administrative buildings. Between 1974 and 2008, a total of 43 buildings had been demolished and 70 new buildings had been erected in their place. The newly-created Dreier Building houses the offices of Admissions, Alumni, Campus Reconstruction, Development, the dean of faculty, the deans of women and men, the Enrollment Center, the executive vice-president, legal counsel, Human Resources, and six classrooms.