Ovid’s reflections on the changes to the landscape around Troy reminds us of the impermanence of human endeavours.

Iam seges est, ubi Troia fuit.

Now there is a field where Troy once stood.

Iam (now)

Seges (field or grain field) is the nominative singular form of "seges," meaning a field or crop.

Est (is)

Ubi (where)

Troia (Troy) is in the nominative singular form.

Fuit (was)