What's that phrase people use when referring to "the best product" from a producer; e.g. the Mona Lisa is Da Vinci's ......?

Question

As if the Mona Lisa is Da Vinci's best work. I swear there is like a French phrase people use when referring to someone's best work. Any ideas? Could also be referring to someone's like most famous work or along those lines

Update:

Meant to 5 stars sorry, yes magnum opus!!

? · Accepted Answer

Magnum opus......

Abhi · Answer

It is usually referred to as a masterpiece.

bluebellbkk · Answer

Or "It's da Vinci's masterpiece".

? · Answer

Their greatest work.

gerald · Answer

Its a matter of opinion that creates that not the artist Da Vinci did much better works ,

Cogito · Answer

I think you might be thinking of 'pièce de résistance' which means a masterpiece; the most memorable accomplishment of one’s career or lifetime.

? · Answer

Mistake.

There's another portrait underneath Ms. Lisa.

What's that phrase people use when referring to "the best product" from a producer; e.g. the Mona Lisa is Da Vinci's ......?

7 Answers