/usr/share/icons/hicolor/16x16/ is in hicolor-icon-theme 0.12-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/icons/hicolor/16x16/intl/
/usr/share/icons/hicolor/16x16/apps/
/usr/share/icons/hicolor/16x16/status/
/usr/share/icons/hicolor/16x16/places/
/usr/share/icons/hicolor/16x16/devices/
/usr/share/icons/hicolor/16x16/filesystems/
/usr/share/icons/hicolor/16x16/stock/
/usr/share/icons/hicolor/16x16/stock/table/
/usr/share/icons/hicolor/16x16/stock/object/
/usr/share/icons/hicolor/16x16/stock/text/
/usr/share/icons/hicolor/16x16/stock/code/
/usr/share/icons/hicolor/16x16/stock/io/
/usr/share/icons/hicolor/16x16/stock/navigation/
/usr/share/icons/hicolor/16x16/stock/media/
/usr/share/icons/hicolor/16x16/stock/chart/
/usr/share/icons/hicolor/16x16/stock/image/
/usr/share/icons/hicolor/16x16/stock/form/
/usr/share/icons/hicolor/16x16/stock/net/
/usr/share/icons/hicolor/16x16/stock/data/
/usr/share/icons/hicolor/16x16/actions/
/usr/share/icons/hicolor/16x16/emblems/
/usr/share/icons/hicolor/16x16/mimetypes/
/usr/share/icons/hicolor/16x16/categories/
/usr/share/icons/hicolor/16x16/emotes/
/usr/share/icons/hicolor/16x16/animations/