The Black Tower is the Asha'man equivalent of the White Tower. It was created by Rand al'Thor, the Dragon Reborn.

In the early stages of the Black Tower, there was no physical Black Tower. It was a small farm where men who could channel were taken. Soon after Tarmon Gai'don, more men came forward with the ability to channel and trained in the Black Tower.

So many male channelers had come forward, that the bustling farm had become inadequate. Thus, beginning the construction of an actual Black Tower. Ogier stonemasons, Aes Sedai, and Asha'man worked to together to quickly construct the Black Tower. It's layout was a perfect match of the White Tower except for it's sleek, black, shining walls.