For the first time optical CMDs of the globular cluster Terzan 6 are presented. It was observed in the V, I and Gunn z bands, under excellent seeing conditions. The horizontal branch morphology is red, and from the RGB morphology we conclude that its metallicity is intermediate between those of 47 Tuc and NGC 6528/NGC 6553.
A reddening
of E(B-V) = 2.24 and a distance 
kpc
(for R = 3.1) are found.
Terzan 6 adds to the list of bulge metal-rich clusters with accurate optical photometric data. This is important for the understanding of the bulge structure, and provides the basic information for spectroscopy of individual stars, which will become possible with the new generation of large telescopes.
Acknowledgements
BB and EB acknowledge partial financial support from CNPq, Fapesp and Fapergs.