The best view to the Cairo is from here. Even pyramids are visible as you can see on my intro page. You can take excellent pics from here.
I don't remember the names of those mosques. As I remember well, they are initiated to two sisters or something like that. Anyway, they look great. Ask your tourist guide about them.
As Islam religion prohibits representing of people or animals, wall in the mosque are decorated some other paintings. Most of them are texts from Koran written in calligraphy.
There are two things you must see in the Citadel. The first one is Alabaster Mosque. The second one is building where were described life of Farouk, the last Egyptian king.
Entering in the Citadel coast 20 Egyptian Pounds (7 Egyptian Pounds = 1 Euro). It is seven Egyptian Pounds for one Euro. It includes visiting of all sights there.
One of the oldest mosques on the site, and the only structure that still remains from the Mamluk period. It has been stripped of its original beautified tiles but you can still get an idea of it.
This is the imposing mosque in the southern entrance area. It resembles other Turkish mosques built around the same time, and took 18 years to build.
This is one of the most imposing structures on the Eastern Cairo skyline. The massive Mohammed Ali mosque as well as the medieval fortifications.
Citadel views of the whole city are superb. reaching it is not easy as you have the only option to take a charter, I did try to get info about buses getting there but no succed on that.
It is quite possible to spend half a day more visiting the mosques, museums and monuments within the Citadel. Not only that, there are fantastic views over Cairo, with the pyramids behind to enjoy.
An interesting mosque up at the citadel. The ceilings inside are beautiful and it also has some gorgeous chandeliers.
See more pics in travelogue.