We are about to enter Atzel's FORTRESS.
The Big Bang Theory Season 2, Episode 3
Casterly Rock
is an impregnable FORTRESS.
Game of Thrones Season 7, Episode 3
And we need
every FORTRESS we have
Game of Thrones Season 7, Episode 1
...I will be enjoying a blissful evening
in my personal Fortress of Solitude.
The Big Bang Theory Season 2, Episode 21
and abandon this FORTRESS
you can no longer hold.
Game of Thrones Season 4, Episode 8