The Circum-Nuclear Disk (CND) is probably a by-product of the explosive event which created Sgr A East. Its inner edge of radius R ~ 1.7pc is well developed and comprises the Central Cavity (CC) which is filled with ~ 260 M⊙ of ionized gas. ISM appears to flow through the CND into the Central Cavity at a rate of M ~ 0.01 M⊙yr−1. Dust and Lyman continuum luminosities of the central 1.25 parsec, corrected for photons not absorbed by dust and gas inside the CC are ~ 108L⊙ and ~ 1051 Lyc photons s−1, most of which are provided by a cluster of 24 hot and massive stars, which also provide ~ 1/3 of the integrated K-band flux density (see the recent review by Mezger et al., 1996). A larger number of cool M- and K-giants and more than a million low-mass MS stars provide the remaining flux density, which comes from a diffuse background emission first seen in our NIR mosaic maps (Zylka et al., 1997).