What are these things???

[Nelson]

They look like buildings sailed by accountants.

It's fun to charter an accountant
And sail the wide accountan-cy,
To find, explore the funds offshore
And skirt the shoals of bankruptcy.

It can be manly in insurance:
We'll up your premium semiannually.
It's all tax-deductible,
We're fairly incorruptible,
We're sailing on the wide accountan-cy!

Monty Python

[Bob the Insane]

They look like buildings sailed by accountants.

It's fun to charter an accountant
And sail the wide accountan-cy,
To find, explore the funds offshore
And skirt the shoals of bankruptcy.

It can be manly in insurance:
We'll up your premium semiannually.
It's all tax-deductible,
We're fairly incorruptible,
We're sailing on the wide accountan-cy!

Monty Python

You mean Corporate Raiders??

[Tamur]

They're called a helepolis. These are slightly post-Alexander monstrosities, loaded with catapults on the lower floors and oxybeles on the upper floors. The largest recorded was something like 30 meters tall (100 feet)! I can't believe they actually got these in the game...

Maybe they're just normal armoured seige towers (i.e. no armaments, just hide covering and a stairway for troops to climb up to the top). That would be VERY cool if they are helepolises.