  About 2 million seconds of Chandra observing time have been devoted to the
Galactic center (GC), including large-scale surveys and deep pointings. These
observations have led to the detection of about 4000 discrete X-ray sources and
the mapping of diffuse X-ray emission in various energy bands. In this review,
I first summarize general results from recent studies and then present close-up
views of the three massive star clusters (Arches, Quintuplet, and GC) and their
interplay with the Galactic nuclear environment.
