  We study the four point function of the superconformal primary of the
stress-tensor multiplet in four dimensional $\mathcal{N}=4$ Super Yang Mills,
at large 't Hooft coupling and in a large $N$ expansion. This observable is
holographically dual to four graviton amplitudes in type IIB supergravity on
$AdS_5 \times S^5$. We construct the most trascendental piece of the correlator
at order $N^{-6}$ and compare it with the flat space limit of the corresponding
two loops amplitude. This comparison allows us to conjecture structures of the
correlator/amplitude which should be present at any loop order.
