  Analysis of the radio synchrotron and X-ray inverse-Compton emission from
radio-loud active galaxies allows us to determine their particle acceleration
processes and electron energy spectra. Previous studies have provided new
constraints on the total energy budget and particle content of powerful radio
galaxies and quasars; however, in most cases the sources are too faint in the
X-ray to obtain spatial information. We present archival and new
multi-frequency radio observations from the VLA and GMRT, and XMM-Newton
observations of the bright FRII radio galaxy 3C353 which lies on the edge of
the X-ray-luminous cluster Zw 1718.1-0108. The X-ray observations detect both
the inverse-Compton emission from the radio galaxy lobes and thermal emission
from the hot phase of the intracluster medium. We discuss the properties of the
particle energy spectrum as a function of position in the lobe, as well as the
properties of the merging cluster.
