William Herschel discovered NGC 4525 = H II-325 = h1328 on 13 Mar 1785 (sweep 387) and noted "F, pL, E, bM." JH made the single observation "pF; L; R; 60"." and did not measure a position.

400/500mm - 18" (4/10/04): moderately bright, fairly large, elongated 2:1 SW-NE, broadly concentrated to an ill-defined 0.8' core. A low surface brightness halo increases the size to at least 2.0'x.1.0'. The halo is irregular or patchy and fades into the background so is difficult to trace, though it is a little brighter on the SW extension.

Notes by Steve Gottlieb