C'était magnifique.
Here's a breakdown:
* C'était - This is the past tense of the verb "être" (to be), meaning "it was".
* magnifique - This is the adjective meaning "magnificent".
You can also use other phrases like:
* C'était extraordinaire. (It was extraordinary)
* C'était splendide. (It was splendid)
* C'était grandiose. (It was grand)
The choice will depend on the context and the level of grandeur you want to express.