/usr/include/ThePEG/Repository/ is in libthepeg-dev 1.8.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ThePEG/Repository/BaseRepository.h
/usr/include/ThePEG/Repository/BaseRepository.tcc
/usr/include/ThePEG/Repository/BaseRepository.xh
/usr/include/ThePEG/Repository/CurrentGenerator.fh
/usr/include/ThePEG/Repository/CurrentGenerator.h
/usr/include/ThePEG/Repository/EventGenerator.fh
/usr/include/ThePEG/Repository/EventGenerator.h
/usr/include/ThePEG/Repository/EventGenerator.tcc
/usr/include/ThePEG/Repository/EventGenerator.xh
/usr/include/ThePEG/Repository/Main.h
/usr/include/ThePEG/Repository/MultiEventGenerator.h
/usr/include/ThePEG/Repository/RandomGenerator.fh
/usr/include/ThePEG/Repository/RandomGenerator.h
/usr/include/ThePEG/Repository/Repository.h
/usr/include/ThePEG/Repository/StandardRandom.h
/usr/include/ThePEG/Repository/Strategy.fh
/usr/include/ThePEG/Repository/Strategy.h
/usr/include/ThePEG/Repository/ThePEGStrategy.h
/usr/include/ThePEG/Repository/UseRandom.fh
/usr/include/ThePEG/Repository/UseRandom.h