  The search for neutrinoless double beta ($0\nu\beta\beta$) decay is the best
way to test lepton number violation and Majorana nature of neutrinos. One of
the most promising techniques to discover $0\nu\beta\beta$ decay is by
operating High-Purity Ge detectors enriched in $^{76}$Ge. The current
generation of $^{76}$Ge experiments, GERDA and MAJORANA, lead the field in the
achieved energy resolution and ultra-low background. These are two of the most
important characteristics for sensitive searches of this undiscovered decay.
The next generation of $0\nu\beta\beta$ decay experiments requires more mass
and further reduction of backgrounds to maximize the discovery potential.
Building on the successes of GERDA and MAJORANA, the LEGEND collaboration has
been formed to pursue a tonne-scale $^{76}$Ge experiment, with a discovery
potential projected to be a half-life beyond 10^{28} years. The collaboration
aims to develop a phased experimental program, starting with a 200 kg
measurement by repurposing the existing Gerda infrastructure.
