/usr/include/SFML/Window/ is in libsfml-dev 2.3.2+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/SFML/Window/Context.hpp
/usr/include/SFML/Window/ContextSettings.hpp
/usr/include/SFML/Window/Event.hpp
/usr/include/SFML/Window/Export.hpp
/usr/include/SFML/Window/GlResource.hpp
/usr/include/SFML/Window/Joystick.hpp
/usr/include/SFML/Window/Keyboard.hpp
/usr/include/SFML/Window/Mouse.hpp
/usr/include/SFML/Window/Sensor.hpp
/usr/include/SFML/Window/Touch.hpp
/usr/include/SFML/Window/VideoMode.hpp
/usr/include/SFML/Window/Window.hpp
/usr/include/SFML/Window/WindowHandle.hpp
/usr/include/SFML/Window/WindowStyle.hpp