The title is about someone famous in Greek history who has died.
The speaker is looking at all the pictures on the urn, and discussing them.
The speaker uses a mixture of happy and sad language, which conveys a very complicated, bittersweet emotion. He also uses a great deal of language about countrysides and plants.
The speaker seems wistful about the passage of time.
A shift occurs in the final stanza, when the speaker stops describing the scenes on the urn and writes about how the urn will endure, unchanged, even as human life moves on.
After reading the poem, I think that my title was partially correct. The poem was deeper than expected, and wasn’t about a particular person.
Some things about life are the same as centuries ago; the urn is immortal as are the images on the sides.