"Look on my works, ye mighty and despair." From which poem this line has been taken?

"Look on my works, ye mighty and despair." From which poem this line has been taken?

Explanation

The line "Look on my works, ye Mighty, and despair!" is from the poem "Ozymandias" by Percy Bysshe Shelley.

It reflects the theme of the impermanence of power and pride.