  The most common methods to derive the distance to globular clusters using RR
Lyrae variables are reviewed, with a special attention to those that have
experienced significant improvement in the past few years. From the weighted
average of these most recent determinations the absolute magnitude of the RR
Lyrae stars at [Fe/H]=-1.5 is Mv = 0.59 +/- 0.03 mag, corresponding to a
distance modulus for the LMC (m-M)o = 18.48 +/- 0.05.
