[Attalus]

Jen, this is a Romantic poem with the capital R. Shelley was a member of the Romantic movement or period, and they had the characteristics of being intensely emotional, concerned with antiquities and the past, in love with wildness, mystery, and the unknown, and obsessed wiuth death. Also they were concerned with nature, the shape of society, and human nature. You can see several of these characteristics in "Ozymandias," like the antiquarian nature of the poem, the contrast between the mighty king and the unknown sculptor who mocked him, and the transient nature of earthly power. Shelley, in case you didn't know, was an extreme left-winger.