NGC 6528 is a globular cluster in the constellation Sagittarius, and is listed in the New General Catalogue.

[2] Dreyer described it as "pF, cS, R", meaning poor and faint, considerably small and round.

Both are located in Baade's Window, a relatively clear area near the galactic equator.

The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18-inch telescopes.

The NGC 6528 is unusually metal-rich for a globular cluster, and is very similar in composition to NGC 6553, suggesting an origin in a similar environment.