/usr/lib/ is in librenaissance0-dev 0.9.0-4build4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/GNUstep/
/usr/lib/GNUstep/Applications/
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/stamp.make
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/Resources/
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/Resources/Info-gnustep.plist
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/Resources/GSMarkupBrowser.desktop
/usr/lib/GNUstep/Applications/GSMarkupBrowser.app/GSMarkupBrowser
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/GSMarkupLocalizableStrings
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/stamp.make
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/Resources/
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/Resources/Info-gnustep.plist
/usr/lib/GNUstep/Applications/GSMarkupLocalizableStrings.app/Resources/GSMarkupLocalizableStrings.desktop
/usr/lib/libRenaissance.so