[Cardhu]

Not a fan, but know of the Prisoner of Chillon.

There are seven pillars of Gothic mould,
In Chillon's dungeons deep and old,
There are seven columns, massy and grey,
Dim with a dull imprison'd ray,
A sunbeam which hath lost its way...

The Prisoner of Chillon

[Darlin']

Yes, that is it. :)