VI photometry of the galactic cluster Berkeley 66

A colour magnitude diagram (CMD) extend- ing to V ' 19 mag is given for 444 stars in the region of the galactic cluster Berkeley 66. The V and I photometry of a nearby eld is also reported. This object appears very faint, highly contaminated by foreground stars and very reddened. The apparent distance modulus (m M )a nd the colour excess EV I are guessed to be 17.5 and 1.1, re- spectively, with an uncertainty of at least 30%. Adopting these values the comparison of the CMD with theoretical isochrones from the Padova group provides an age around 1.0 Gyr.