The term 'Place of Perfect Happiness' can be summarized by two crossword solutions: UTOPIA (6 letters) and ELYSIUM (7 letters). UTOPIA is a term coined by Thomas More in 1516 to describe an ideal society, and has since been used to refer to any place or state of perfect happiness. ELYSIUM is a place in Greek mythology where the souls of the heroic and virtuous go after death. It is often described as a paradise, and is sometimes used as a synonym for UTOPIA.