Observed CMD diagrams of the five GCs in the Fornax dSph. Red datapoints show confirmed RR Lyrae stars collected from Mackey & Gilmore (2003a), Greco et al. (2007). Overlaid isochrones trace a metal-poor ([Fe/H] = −2.5 dex) population at a fixed age of 14 Gyr, taken from the Dartmouth Stellar Evolution Database isochrone set (Dotter et al. 2008). For each isochrone, we adopted a distance as derived from RR Lyrae stars assuming a metallicity as determined from spectroscopic measurements (see Table 1).