[+glory] sommet m
a writer at the height of his powers un écrivain au summum de sa puissance
→ He died when he was at the height of his career.
at the height of the summer au cœur de l'été
at its height, ...
(=at time of greatest success) à son apogée, ...
→ At its height, the company employed 12,000 people.
At its height the community could boast three synagogues. La communauté comptait trois synagogues à son apogée.
(=at most extreme point) à son plus haut point
→ a chronic addiction to nicotine that at its height saw her smoking 60 cigarettes a day
to be at its height
[phenomenon] être à son paroxysme
→ Emigration from Britain to Brittany was at its height during the nineteenth century.