  We present 236 new radial velocities of galaxies in the cluster A2256
measured with the WIYN Hydra multi-object spectrograph. Combined with the
previous work of Fabricant, Kent, and Kurtz (1989), we have velocities for a
total of 319 galaxies of which 277 are cluster members. In addition to the new
radial velocities, we present a 3x3 image mosaic in the R band of the central
19'x19' region of A2256, from which we obtained photometry for 861 galaxies.
These data provide strong evidence for a merger event between two groups. In
addition, we present evidence for the presence of a third group, on the outer
reaches of the system, that is just now beginning to merge with the system.
