a chef d'oeuvre

(formal)

an artist's or writer's best piece of work The Decameron is widely regarded as Boccaccio's chef d'oeuvre.

Name	Pronounced	Usage
Lavrenti	-	Russian
Martzel	-	Basque
Rosie	ROZ-ee	English
Arianrhod	-	Welsh, Welsh Mythology
Roald	-	Norwegian
Mohinder	-	Indian (Sikh)