ECAP combines expertise in the fields of neutrino, X-ray and very-high-energy gamma-ray astronomy. ECAP also integrates the research in neutrino physics, in optical astronomy and the development of new detectors. Theory groups work in quantum gravity and statistical physics. With the ECAP, the University of Erlangen-Nuremberg has created an outstanding framework for scietists to participate in major projects of astroparticle physics: in neutrino astronomy we participate in the projects ANTARES, KM3NeT and IceCube; the experiments H.E.S.S. and CTA work in the field of very-high-energy gamma-ray astronomy; the satellite experiments eROSITA and ATHENA belong to a new generation of X-ray telescopes; EXO-200, nEXO and ORCA investigate neutrino properties. In all of these experiments, scientists of the ECAP are deeply involved in the manifold challenges of constructing and running detectors in such extreme conditions as the deep sea/ice, deep underground or space. Detector development at ECAP is not restricted to fundamental research but is successfully transferred to medical applications.