  Upon treating the whole closed-string massless NS-NS sector as stringy
graviton fields, Double Field Theory may evolve into `Stringy Gravity'. In
terms of an $\mathbf{O}(D,D)$ covariant differential geometry beyond Riemann,
we present the definitions of the off-shell conserved stringy Einstein
curvature tensor and the on-shell conserved stringy Energy-Momentum tensor.
Equating them, all the equations of motion of the massless sector are unified
into a single expression, $G_{AB}{=8\pi G} T_{AB}$, carrying $\mathbf{O}(D,D)$
vector indices, which we dub `the Einstein Double Field Equations'.
