Ode on a Grecian Urn - IV

Who are these coming to the sacrifice?

To what green altar, O mysterious priest,

Lead'st thou that heifer lowing at the skies,

And all her silken flanks with garlands drest?

What little town by river or sea shore,

Or mountain-built with peaceful citadel,

Is emptied of this folk, this pious morn?

And, little town, thy streets for evermore

Will silent be; and not a soul to tell

Why thou art desolate, can e'er return.