D.Gray-man Episode 16: Millennium Swordsman
Episode 16 of 103 of D.Gray-man, aired January 23, 2007, 25 minutes. Available with English subtitles and dub where released.
Episode summary
While searching for an Innocence in Rome, Kanda encounters a mysterious swordsman named Victorio, whose power is unbelievably strong. When Kanda hasn't returned after a while, Komui asks Allen and Lenalee to go to Rome to investigate why Kanda is taking so long, thus they learn the history of Victorio and the Princess, whom he vowed to always fight for.