  In this article, we study projective log smooth pairs with numerically flat
normalized logarithmic tangent bundle. Generalizing works of Jahnke-Radloff and
Greb-Kebekus-Peternell, we show that, passing to an appropriate finite cover
and up to isomorphism, these are the projective spaces or the log smooth pairs
with numerically flat logarithmic tangent bundles blown-up at finitely many
points away from the boundary. On the other hand, the structure of log smooth
pairs with numerically flat logarithmic tangent bundle is well understood: they
are toric fiber bundles over finite \'etale quotients of abelian varieties.
