  The EUROnu project has studied three possible options for future, high
intensity neutrino oscillation facilities in Europe. The first is a Super Beam,
in which the neutrinos come from the decay of pions created by bombarding
targets with a 4 MW proton beam from the CERN High Power Superconducting Proton
Linac. The far detector for this facility is the 500 kt MEMPHYS water
Cherenkov, located in the Fr\'ejus tunnel. The second facility is the Neutrino
Factory, in which the neutrinos come from the decay of {\mu}+ and {\mu}- beams
in a storage ring. The far detector in this case is a 100 kt Magnetised Iron
Neutrino Detector at a baseline of 2000 km. The third option is a Beta Beam, in
which the neutrinos come from the decay of beta emitting isotopes, in
particular 6He and 18Ne, also stored in a ring. The far detector is also the
MEMPHYS detector in the Fr\'ejus tunnel. EUROnu has undertaken conceptual
designs of these facilities and studied the performance of the detectors. Based
on this, it has determined the physics reach of each facility, in particular
for the measurement of CP violation in the lepton sector, and estimated the
cost of construction. These have demonstrated that the best facility to build
is the Neutrino Factory. However, if a powerful proton driver is constructed
for another purpose or if the MEMPHYS detector is built for astroparticle
physics, the Super Beam also becomes very attractive.
