This fortress, from its strong position, was considered as one of the keys to the kingdom, and had belonged to the Earl of March, a disappointed candidate for the crown, who had now attached himself to the banner of England.

The passwords they control are the keys to the kingdom, so what protections should be taken?

Not many people bother to learn them these days. Everything is so rushed, so many demands on a senator's time. But these rules unlock the power of the Senate. They're the keys to the kingdom.

Keys to the kingdom

Meaning

Noun

Synonyms