Sentence examples for a fortress from inspiring English sources

At a Fortress Europe, perhaps?

Build a fortress.

"It's a fortress.

Its Britannia Stadium is a fortress.

My house is like a fortress.

Later it became a fortress.

Calais increasingly resembles a fortress.

Everything is like a fortress".

Why? Beats me". Now that's a fortress.

It's a fortress, of course it is.

Someone probably could build a fortress skyscraper.