What kind of figurative language is “which is a bliss of solitude”

It is a paradox. Contradicting bliss with solitude.

be more specific with your question.

the answer is: tabard inn, southwark.

in "the canterbury tales," by geoffrey chaucer, the twenty-nine diverse group of pilgrims is staying at a tavern in southwark, london, as they are traveling to canterbury. they wish to visit the relics of saint thomas becket in canterbury   cathedral in order to him for his when they underwent necessities.