According to Guinness World Records, the poem Istanbul #2461 was recited by a bride of the Sumerian King Shu-Sin. This poem is around 4000 years old. It was not known to the world, until 1951, when an archaeologist Samuel Noah Kramer found it and translated it.
Image Courtesy: Wikipedia
Read the translation at: ibtimes.co.uk/read-oldest-love-poem-world-1612688