The greatest FORTRESS ever built.
Game of Thrones Season 2, Episode 7
And we need
every FORTRESS we have
Game of Thrones Season 7, Episode 1
and abandon this FORTRESS
you can no longer hold.
Game of Thrones Season 4, Episode 8
I'd call it a
"Fortress of Solitude for babies."
The Big Bang Theory Season 10, Episode 6
Welcome to my FORTRESS of solitude.
The Big Bang Theory Season 8, Episode 7