[Monkey Face]

There are 649 in mine (for now).

[NicknamedBob]

1056000 / 649 = 1627

Of course, this is just by square footage. It does not take into consideration the day rooms and corridors, or the volume of the interior walls. So you would probably reduce the figure by at least 25%.

Still, that's a lot of capacity. The castle was designed like a college campus, and these cell rooms were for single students.