‘Epipsychidion’ is a poetical work by -

Percy Bysshe Shelley, English Romantic poet whose passionate search for personal love and social justice was gradually channeled from overt actions into poems that rank with the greatest in the English language.

NOTABLE WORKS
“Prometheus Unbound”
“The Cenci”
“Queen Mab”
“Hymn to Intellectual Beauty”
“Adonais”
“To a Sky-Lark”
“Ode to the West Wind”
“Epipsychidion”
“Mont Blanc”
“Ozymandias”

Source: Britannica