/usr/include/ is in libgraphene-1.0-dev 1.8.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/graphene-1.0/
/usr/include/graphene-1.0/graphene-box.h
/usr/include/graphene-1.0/graphene-euler.h
/usr/include/graphene-1.0/graphene-frustum.h
/usr/include/graphene-1.0/graphene-gobject.h
/usr/include/graphene-1.0/graphene-macros.h
/usr/include/graphene-1.0/graphene-matrix.h
/usr/include/graphene-1.0/graphene-plane.h
/usr/include/graphene-1.0/graphene-point.h
/usr/include/graphene-1.0/graphene-point3d.h
/usr/include/graphene-1.0/graphene-quad.h
/usr/include/graphene-1.0/graphene-quaternion.h
/usr/include/graphene-1.0/graphene-ray.h
/usr/include/graphene-1.0/graphene-rect.h
/usr/include/graphene-1.0/graphene-simd4f.h
/usr/include/graphene-1.0/graphene-simd4x4f.h
/usr/include/graphene-1.0/graphene-size.h
/usr/include/graphene-1.0/graphene-sphere.h
/usr/include/graphene-1.0/graphene-triangle.h
/usr/include/graphene-1.0/graphene-types.h
/usr/include/graphene-1.0/graphene-vec2.h
/usr/include/graphene-1.0/graphene-vec3.h
/usr/include/graphene-1.0/graphene-vec4.h
/usr/include/graphene-1.0/graphene-version-macros.h
/usr/include/graphene-1.0/graphene-version.h
/usr/include/graphene-1.0/graphene.h