A purple patch is an over-written passage in which the writer has strained too hard to achieve an impressive effect, by elaborate figures or other means. The phrase (Latin: "purpureus pannus") was first used by the Roman poet Horace in his Ars Poetica (c. 20 BC) to denote an irrelevant and excessively ornate passage; the sense of irrelevance is normally absent in modern usage, although such passages are usually incongruous. By extension, purple prose is lavishly figurative, rhythmic, or otherwise overwrought. A purple patch is an over-written passage in which the writer has strained too hard to achieve an impressive effect, by elaborate figures or other means. The phrase (Latin: "purpureus pannus") was first used by the Roman poet Horace in his Ars Poetica (c. 20 BC) to denote an irrelevant and excessively ornate passage; the sense of irrelevance is normally absent in modern usage, although such passages are usually incongruous. By extension, purple prose is lavishly figurative, rhythmic, or otherwise overwrought.