/usr/include/libmediawiki/ is in libmediawiki-dev 1.0~digikam3.5.0-0ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libmediawiki/edit.h
/usr/include/libmediawiki/generalinfo.h
/usr/include/libmediawiki/image.h
/usr/include/libmediawiki/imageinfo.h
/usr/include/libmediawiki/job.h
/usr/include/libmediawiki/login.h
/usr/include/libmediawiki/logout.h
/usr/include/libmediawiki/mediawiki.h
/usr/include/libmediawiki/mediawiki_export.h
/usr/include/libmediawiki/page.h
/usr/include/libmediawiki/parse.h
/usr/include/libmediawiki/protection.h
/usr/include/libmediawiki/queryimageinfo.h
/usr/include/libmediawiki/queryimages.h
/usr/include/libmediawiki/queryinfo.h
/usr/include/libmediawiki/queryrevision.h
/usr/include/libmediawiki/querysiteinfogeneral.h
/usr/include/libmediawiki/querysiteinfousergroups.h
/usr/include/libmediawiki/revision.h
/usr/include/libmediawiki/upload.h
/usr/include/libmediawiki/usergroup.h
/usr/include/libmediawiki/version.h