  KM3NeT is a deep-sea research infrastructure being constructed in the
Mediterranean Sea. It will be installed at three sites: KM3NeT-Fr, offshore
Toulon, France, KM3NeT-It, offshore Portopalo di Capo Passero, Sicily (Italy)
and KM3NeT-Gr, offshore Pylos, Peloponnese, Greece. It will host the next
generation Cherenkov neutrino telescope and nodes for a deep sea
multidisciplinary observatory, providing oceanographers, marine biologists, and
geophysicists with real time measurements. The neutrino telescope will search
for Galactic and extra-Galactic sources of neutrinos, complementing IceCube in
its field of view. The detector will have a modular structure and consists of
six building blocks, each including about one hundred Detection Units (DUs).
Each DU will be equipped with 18 multi-PMT digital optical modules. The first
phase of construction has started and shore and deep-sea infrastructures
hosting the future KM3NeT detector are being prepared in France near Toulon and
in Italy, near Capo Passero in Sicily. The technological solutions for KM3NeT
and the expected performance of the detector are presented and discussed.
