Left: CMD within 1.5′ of the center of BH 176, obtained by photometry of FORS2 VLT images. The mean MS and RGB ridge line is overplotted. Middle: CMD in outer region 1 (RA(2000.0)    = 234.72713 deg, Dec(2000.0) =  − 50.000356 deg) of BH 176, also within a radius of 1.5′. Right: Hess-diagram of BH176, with three isochrones from Marigo et al. (2008), with an age of 7 Gyr and metallicities of 0.0, –0.1 and –0.2.