/usr/ is in libmagick++-6.q16-dev 8:6.8.9.9-7ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/Magick++.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ImageMagick++.pc
/usr/lib/x86_64-linux-gnu/libMagick++-6.Q16.la
/usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/
/usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/
/usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/Magick++-config
/usr/lib/x86_64-linux-gnu/libMagick++-6.Q16.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libmagick++-6.q16-dev/
/usr/share/doc/libmagick++-6.q16-dev/copyright
/usr/lib/x86_64-linux-gnu/libMagick++-6.Q16.so
/usr/share/doc/libmagick++-6.q16-dev/changelog.Debian.gz
/usr/share/doc/libmagick++-6.q16-dev/NEWS.Debian.gz