What made the 'Eve of St. Agnes' by John Keat's a memorable poem?

The 'Eve of St. Agnes' is a narrative poem, enabling the reader to have a clear memory of the structure of the poem. He writes the poem in Spenserian stanza the stanza consists of eight lines of iambic pentameter followed by a single alexandrine, a twelve-syllable iambic line- it uses a complex rhyming scheme. This makes the poem more exiting, and satisfying to read, flowing easily. It also makes it easier to gage what Keats …

…and sets the story for the reader, thus making it easier to remember. As the 'eve of St. Agnes' is a long poem Keats needs to keep the readers attention, tension is carefully built up throughout the poem. The dramatic contrasts used keep the readers attention, and the rapid changes in perception between characters builds tension. The richness of the poem it exiting and touches and absorbs the reader, making it a very memorable read.