s a compact non-thermal radio source, Sgr A*, at the center, with loops and filaments of non-thermal radio emission apparently emerging from it. Far infrared and radio-frequency velocity measurements suggest but do not prove the presence of a black hole with mass 5 x 106 M. There may also be a small, highly variable x-ray source at the nucleus. However, its x-ray luminosity, about 2 x 1038 erg s-1 is smaller by a factor of approximately 100 than that of the nucleus of M 81. This is probably the best estimate or upper limit to the activity of a possible AGN in our Galaxy (Genzel and Townes 1987, Fabbiano 1988).