Moore wrote this poem in 1805, while staying at Jenkinstown Park in County Kilkenny, Ireland, where he was said to have been inspired by a specimen of Rosa 'Old Blush'. The poem is set to a traditional tune called "Aislean an Oigfear", or "The Young Man's Dream", which was transcribed by Edward Bunting in 1792, based on a performance at the Belfast Harp Festival. The poem and the tune together were published in December 1813 in volume 5 of Thomas Moore's A Selection of Irish Melodies. The original piano accompaniment was written by John Andrew Stevenson; several other arrangements followed in the 19th and 20th centuries. — Excerpted from The Last Rose of Summer on Wikipedia, the free encyclopedia.