From a stylistic point of view, is "Annabel Lee" by E.A. Poe a ballad or a narrative poem?

According to the link
listed below, the poem is a "melodious" narrative. A narrative poem tells a story and
in the poem, the speaker is mourning the loss of a young wife which occurred many years before.
He first explains that he blames the angels for her death because they envied the love between
the young couple. He then tells the reader about her funeral and burial. Finally, the speaker
reveals that even though she is dead, he cannot bear being separated from her so he has spent
many nights at her grave. This revelation is both surprising and rather grim. it shows how young
love never dies.]]>