  We embed natural inflation in an explict string theory model and derive
observables in cosmology. We achieve this by compactifying the type IIB string
on a Calabi-Yau orientifold, stabilizing moduli via the Large Volume Scenario,
and configuring axions using D7-brane stacks. In order to obtain a large
effective decay constant, we employ the Kim-Nilles-Peloso alignment mechanism,
with the required multiple axions arising naturally from anisotropic bulk
geometries. The bulk volumes, and hence the axion decay constants, are
stabilized by generalized one-loop corrections and subject to various
conditions: the K\"ahler cone condition on the string geometry; the convex hull
condition of the weak gravity conjecture; and the constraint from the power
spectrum of scalar perturbations. We find that all constraints can be satisfied
in a geometry with relatively small volume and thus heavy bulk axion mass. We
also covariantize the convex hull condition for the axion-dilaton-instanton
system and verify the normalization of the extremal bound.
