/usr/ is in libbelcard-dev 1.0.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/belcard/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/include/belcard/belcard.hpp
/usr/include/belcard/belcard_addressing.hpp
/usr/include/belcard/belcard_calendar.hpp
/usr/include/belcard/belcard_communication.hpp
/usr/include/belcard/belcard_explanatory.hpp
/usr/include/belcard/belcard_general.hpp
/usr/include/belcard/belcard_generic.hpp
/usr/include/belcard/belcard_geographical.hpp
/usr/include/belcard/belcard_identification.hpp
/usr/include/belcard/belcard_organizational.hpp
/usr/include/belcard/belcard_params.hpp
/usr/include/belcard/belcard_parser.hpp
/usr/include/belcard/belcard_property.hpp
/usr/include/belcard/belcard_rfc6474.hpp
/usr/include/belcard/belcard_security.hpp
/usr/include/belcard/belcard_utils.hpp
/usr/include/belcard/vcard_grammar.hpp
/usr/lib/x86_64-linux-gnu/libbelcard.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/belcard.pc
/usr/share/
/usr/share/Belcard/
/usr/share/Belcard/cmake/
/usr/share/Belcard/cmake/BelcardConfig.cmake
/usr/share/Belcard/cmake/BelcardTargets-none.cmake
/usr/share/Belcard/cmake/BelcardTargets.cmake
/usr/share/doc/
/usr/share/doc/libbelcard-dev/
/usr/share/doc/libbelcard-dev/copyright
/usr/lib/x86_64-linux-gnu/libbelcard.so
/usr/share/doc/libbelcard-dev/changelog.Debian.gz