piece de resistance

Plural

pièces de résistance

the most important or impressive part of a series, event, or work

His novel’s pièce de résistance was the final chapter, which completely changed the narrative.
The grand finale was the pièce de résistance of the entire event, drawing gasps from the audience.
The pièce de résistance of their vacation was a guided tour of the ancient ruins.
His pièce de résistance at the art competition was a sculpture that blended modern and classical styles.
The pièce de résistance of the conference was the keynote speaker’s groundbreaking lecture.

Synonyms:

a part of a meal that is considered as the main dish

For the wedding feast, the pièce de résistance was a grand seafood platter that impressed all the guests.
The pièce de résistance of the dinner was a perfectly roasted lamb served with a rich gravy.
The chef proudly presented the pièce de résistance of the evening: a luxurious foie gras dish.
For their anniversary celebration, the pièce de résistance was a lobster tail, prepared to perfection.
At the banquet, the pièce de résistance was a massive beef Wellington, the talk of the evening.