Old Main was constructed between 1884 and 1893. It is listed on the National Register of Historic Places. The Hanson Hall of Science was dedicated in 1998 is the largest academic building serving about 700 students in 17 majors, minors and concentrations. The Hanson Hall of Science's facilities and resources include seven classrooms, thirty-five laboratories (including a cadaver lab), a 400 MHz liquid-and solid-state NMR (nuclear magnetic resonance) spectrometer, scanning electron microscope, instrumentation for X-ray powder crystallography and a 40-foot greenhouse.