crowning glory

noun

noun

The best and most notable aspect of something; the greatest achievement; the most beautiful thing.

Her hair is her crowning glory.
The crowning glory of the property developments was then built in 1927-29 as a luxury block of flats above Baker Street […]. Chiltern Court became the home of authors H G Wells and Arnold Bennett.2024 January 24, Stefanie Foster, “Metro-land's legacy for today's railway”, in RAIL, number 1001, pages 58-59:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.