I was
not paid for my Ivory Tower logo, below. This is an outrage, given all the hard work I put in copying this image from the web.
A common misconception is that it is tower as in 'tall pointy building', when in fact it is tower as in 'he who tows'. The expression 'ivory tower' is actually used in many cultures to refer to a hard-working elephant. Yes, he doesn't have any ivory in the image I used - that's because his tusks have been worn down by all the hard work he's doing.