/usr/share/help/gl/rhythmbox/ is in rhythmbox-data 3.4.2-4ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/gl/rhythmbox/fdl-appendix.xml
/usr/share/help/gl/rhythmbox/figures/
/usr/share/help/gl/rhythmbox/figures/rb-iradio-main.png
/usr/share/help/gl/rhythmbox/figures/rb-notification-area-menu.png
/usr/share/help/gl/rhythmbox/figures/rb-notification-window.png
/usr/share/help/gl/rhythmbox/figures/rb-notification-zone.png
/usr/share/help/gl/rhythmbox/figures/rb-podcast-main.png
/usr/share/help/gl/rhythmbox/figures/rb-statusbar.png
/usr/share/help/gl/rhythmbox/figures/rb-toolbar-prevplaynext.png
/usr/share/help/gl/rhythmbox/figures/rb-toolbar-repeat.png
/usr/share/help/gl/rhythmbox/figures/rb-toolbar-shuffle.png
/usr/share/help/gl/rhythmbox/figures/rb-toolbar.png
/usr/share/help/gl/rhythmbox/figures/rb-volume-changer.png
/usr/share/help/gl/rhythmbox/figures/rb-window-small.png
/usr/share/help/gl/rhythmbox/figures/rb-window.png
/usr/share/help/gl/rhythmbox/index.docbook
/usr/share/help/gl/rhythmbox/legal.xml