  The NA57 experiment has been designed to study the production of strange and
multi-strange particles in Pb-Pb and p-Be collisions at the CERN SPS. The
predecessor experiment WA97 has measured an enhanced abundance of strange
particles in Pb-Pb collisions relative to p-A reactions at 160 GeV/c per
nucleon beam momentum. NA57 has extended the WA97 measurements to investigate
the evolution of the strangeness enhancement pattern as a function of the beam
energy and over a wider centrality range. In this paper, we report results on
cascade production for about the 60% most central collisions at 160 GeV/c per
nucleon.
