"the smallest tenement in Parnassus"

Mount Parnassus is a mountain of limestone in central Greece.  In Greek mythology, the mountain is sacred to Apollo and the Corycian nymphs, and is home to the muses.  The mountain is named after Parnassos, the son of Kleodora, a nymph, and Kleopompus, a man.  As the home of the Muses, Parnassus was associated with poetry, music, and learning.

Parnassus
Public DomainParnassus - Credit: Andrea Mantegna, 1497