From Poe's "William Wilson," identify the elements that come together to classify it as Gothic literature.

Some of the elements in "William Wilson" by Poe, which is
categorized as an allegorical parable, that classify it as of the Gothic tradition have
to do with setting, characters, and psychological aspects. Gothic stories traditionally
take place in old ruined abbeys or castles, but as the Gothic genre expanded, any old,
dark mysterious building, like Eton or Oxford,  might do instead of a castle or
abbey.

The Gothic genre is also defined by the presence in
the character list of ghosts, doppelgangers (a counterpart of a person), or phantoms.
The eerie namesake, with the face identical to William's own, certainly qualifies as a
Gothic doppelganger, and his haunting comings and goings fill the definitive requirement
for hauntings or other spiritual and supernatural
activity.

Motifs that are requisite in Gothic genre works
are death and blood to accompany the supernatural. The final scene certainly fulfills
this requirement. The psychological factor driving the characters in Gothic stories is
often represented by fear, terror and dread, as is the case in "William
Wilson."