  We present a new and deep analysis of the pulsar wind nebula (PWN)
HESS\,J1825--137 with a comprehensive data set of almost 400 hours taken with
the H.E.S.S. array between 2004 and 2016. The large amount of data, and the
inclusion of low-threshold H.E.S.S. II data allows us to include a wide energy
range of more than 2.5 orders of magnitude, ranging from 150 GeV up to 70 TeV.
We exploit this rich data set to study the morphology and the spectral
distributions of various subregions of this largely extended source in more
detail. We find that HESS\,J1825--137 is not only the brightest source in that
region above 32 TeV, but is also one of the most luminous of all firmly
identified pulsar wind nebulae in the Milky Way.
