  Cepheids are the pillar of the extragalactic distance scale, but their reach
in distance is not sufficient to calibrate H_0. Yet HST has provided Cepheid
distances to eight galaxies which have produced SNe Ia. The latter are used as
nearly perfect standard candles to carry the distance scale to 30,000 km/s,
giving H_0 = 58 +/- 5. This determination finds support in other methods but
its range in distance and its weight is unparalleled.
