Masterpiece (or chef d'œuvre) in modern usage refers to a creation that has been given much critical praise, especially one that is considered the greatest work of a person's career or to a work of outstanding creativity, skill or workmanship. Originally, the term masterpiece referred to a piece of work produced by an apprentice or journeyman aspiring to become a master craftsman in the old European guild system. His fitness to qualify for guild membership was judged partially by the Masterpiece, and if he was successful, it was retained by the guild.
OmegaWiki Dictionary
Ω
masterpiece exceptionally accomplished works of art.