/usr/include/votca/csg/ is in libvotca-csg-dev 1.4.1-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/votca/csg/bead.h
/usr/include/votca/csg/beadlist.h
/usr/include/votca/csg/beadpair.h
/usr/include/votca/csg/beadtriple.h
/usr/include/votca/csg/beadtype.h
/usr/include/votca/csg/boundarycondition.h
/usr/include/votca/csg/cgengine.h
/usr/include/votca/csg/cgmoleculedef.h
/usr/include/votca/csg/cgobserver.h
/usr/include/votca/csg/csgapplication.h
/usr/include/votca/csg/exclusionlist.h
/usr/include/votca/csg/fileformatfactory.h
/usr/include/votca/csg/imcio.h
/usr/include/votca/csg/interaction.h
/usr/include/votca/csg/map.h
/usr/include/votca/csg/molecule.h
/usr/include/votca/csg/nblist.h
/usr/include/votca/csg/nblistgrid.h
/usr/include/votca/csg/nematicorder.h
/usr/include/votca/csg/openbox.h
/usr/include/votca/csg/orthorhombicbox.h
/usr/include/votca/csg/pairlist.h
/usr/include/votca/csg/potentialfunction.h
/usr/include/votca/csg/potentialfunctioncbspl.h
/usr/include/votca/csg/potentialfunctionlj126.h
/usr/include/votca/csg/potentialfunctionljg.h
/usr/include/votca/csg/residue.h
/usr/include/votca/csg/topology.h
/usr/include/votca/csg/topologyitem.h
/usr/include/votca/csg/topologymap.h
/usr/include/votca/csg/topologyreader.h
/usr/include/votca/csg/trajectoryreader.h
/usr/include/votca/csg/trajectorywriter.h
/usr/include/votca/csg/triclinicbox.h
/usr/include/votca/csg/triplelist.h
/usr/include/votca/csg/version.h