a thing of beauty is a hoy forever: analyse

[Marlies]

Hey

I'm from Belgium. My English is not that good, but I'm going to try to make myself clear
For my English exam, I have to analyse a poem. The poem is of John Keats, and it begins with 'A thing of beauty is a joy forever'.
Is there someone who has some information for me of the poem?
What does 'Endymion' means by the way?

Thanks for your help!!!

XXX
Marlies

[Jonah]

Endymion
by Micha F. Lindemans
Endymion was a handsome shepherd boy of Asia Minor, the mortal lover of the moon goddess Selene. Each night he was kissed to sleep by her. She begged Zeus to grant him eternal life so she might be able to embrace him forever. Zeus complied, putting Endymion into eternal sleep and each night Selene visits him on Mt. Latmus, near Milete, in Asia Minor. The ancient Greeks believed that his grave was situated on this mountain. Selene and Endymion have fifty daughters.

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[Saturn]

Good reply Jonah - and welcome on board