And now for something completely different: who is inspired by whom?
(my own thoughts, not scientifically based)
The majority will probably agree that Romeo and Juliet (early modern English: The Most Excellent and Lamentable Tragedy of Romeo and Juliet) is a drama by William Shakespeare.
The work was probably written in 1594-96. It first appeared in print in 1597. Shakespeare's main source was Arthur Brooke's The Tragicall Historye of Romeus and Iuliet from 1562. Romeo and Juliet are considered the most famous lovers in world literature. The material has been adapted in many musical and literary variants, there are numerous film adaptations, and the work has enjoyed unbroken popularity on the stage since its creation.
One author who was inspired by the Romeo and Juliet theme was J.R.R. Tolkien. His tragic lovers are called Beren and Lúthien, which he portrays magnificently in his (unfinished) Lay of Leithian.
Already in my school days I encountered a much older tragic couple of lovers: Pyramus and Thisbe.
The saga of Pyramus and Thisbe was widely known in antiquity and is mentioned several times in extant works. The earliest and most detailed account is found in Ovid's epic of transformation sagas entitled Metamorphoses (probably published in 8 AD). His account culminates, as is the intention of this work, in a transformation: the fruits of the mulberry tree are since then no longer white, but blood-red.
I still know the first verse by heart today (yes, it's a hexameter):
Pyramus et Thisbe, iuvenum pulcherrimus alter,
altera, quas oriens habuit, praelata puellis,
contiguas tenuere domos, ubi dicitur altam
coctilibus muris cinxisse Semiramis urbem.
The Romans express themselves a little like Master Yoda. Therefore, one must always adapt the literal translation a little without departing too much from the original:
Pyramus and Thisbe, he the most beautiful youth,
she, outstanding among the girls that the Orient possessed,
inhabited adjacent houses, where Semiramis is said
to have surrounded the high city with a wall of bricks.
Then it goes like this:
Acquaintance and first steps of love brought about the neighborhood: over time, love grew.
They would also have married legally, but the fathers forbade it.
What they could not forbid: both burned equally after their sense of love was captured.
There are no confidants. They communicate by nods and signs, and the more it is covered, the more the fire blazes.
The wall common to the two houses was split by a crack that it had once received when it was built.
This damage, which for long centuries had not been noticed by anyone - what does love not notice? - you lovers were the first to see, and made it a path for your voice;
and surely the flattery used to pass through it in the form of the softest murmurings.
Often, as soon as they stood there, here Thisbe, there Pyramus, and mutually the breath of the mouth had been caught, they said:
"Envious wall, what do you hinder the lovers ? What would be in it if we could join with whole body or if that is too much, you stand open so that we can kiss.
But we are not ungrateful: we confess that it is thanks to You that our words are given a passage to the ears of the beloved.
(to be continued, if I'm not banned because of spread of boredom)