One of the most influential and well-known poems in American history, The Raven was a definite highlight in the career of Edgar Allen Poe that made him a household name and helped fuel his popularity for his short career as a writer.
The Poem is made up of 18 stanzas of six lines each. The meter is generally accepted to be in torchaic octameter. Poe, however, claimed the poem to be in a combination of octameter acatalectic, heptameter catalectic and tetrameter catalectic. (The text above is borrowed heavily from the Wikipedia poetic structure section of The Raven and left here for our own reference).