the second part of Dante's Divine Comedy, following the Inferno, and preceding the Paradiso. The poem was written in the early 14th century. It is an allegory telling of the climb of Dante up the Mount of Purgatory, guided by the Roman poet Virgil, except for the last four cantos at which point Beatrice takes over as Dante's guide.
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It had reminded me of Dante's Purgatorio, which I'd read in school. The only part of the story I remembered was the inhabitants lugging huge stones around a mountain.
Sue Monk Kidd. The Mermaid Chair, p.284 (2005)
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"L' altra vedete ch'ha fatto alla guancia
Della sua palma, sospirando, letto."
—Purgatorio, vii.
George Eliot. Middlemach
*Lastly he looked to the cheek of his palm, sighing, read.