/etc/X11/ is in xpat2 1.07-18.
This file is owned by root:root, with mode 0o755.
..
/etc/X11/app-defaults/
/etc/X11/app-defaults/XPat
/etc/X11/de_DE/
/etc/X11/de_DE/app-defaults/
/etc/X11/de_DE/app-defaults/XPat
/etc/X11/fr_FR/
/etc/X11/fr_FR/app-defaults/
/etc/X11/fr_FR/app-defaults/XPat
/etc/X11/french/
/etc/X11/french/app-defaults/
/etc/X11/french/app-defaults/XPat
/etc/X11/german/
/etc/X11/german/app-defaults/
/etc/X11/german/app-defaults/XPat
/etc/X11/it_IT/
/etc/X11/it_IT/app-defaults/
/etc/X11/it_IT/app-defaults/XPat
/etc/X11/italian/
/etc/X11/italian/app-defaults/
/etc/X11/italian/app-defaults/XPat
/etc/X11/russian/
/etc/X11/russian/app-defaults/
/etc/X11/russian/app-defaults/XPat