The Living Monolith is a fictional supervillain in the Marvel Comics universe. He first appeared in X-Men #54 (1969).

Ahmet Abdol was a professor of Ancient Egypt who discovered he had the ability to manipulate cosmic energy , mainly by absorbing it and projecting it as energy blasts. Deciding to use his powers for his own personal gain, Abdol created a cult around himself and set about his plan to rule the world. Now, Abdol was the Living Pharoah while in his normal appearance, but once he obtained enough cosmic energy, he would increase in size, mass, and power, thus becoming the Living Monolith. Abdol discovered that a mutant, Havok, (Alex Summers), brother to Scott Summers also known as Cyclops) who could absorb and project cosmic energy more easily then Abdol could. Abdol kidnapped Havok and used him to power himself up. Abdol has mainly been an X-Men villain, usually using Havok to become the Living Monolith. He has also used other super heroes as the Fantastic Four, who gained their super powers from exposure to cosmic rays. He even killed his own daughter to achieve his goal for them. Though he is usually the one pulling the strings, another X villian, Apocalypse, who wanted to use him to drain the powers of other super beings. Abdol went on a rampage and several of Marvel's Heroes attempted to stop him. Eventually Abdol grew so large that Thor had to throw him in space where he eventually became a Living Planet, similar to Ego.

The Living Monolith's history was later retconned. It was revealed that Abdol's powers did not spring from an inherent mutation, but rather from a procedure performed on him by Mister Sinister. Sinister spliced certain x-genes from Alex Summers into his genome, thus giving Abdol the ability to absorb cosmic energy. Since his powers were genetically similar to Havok's, this explained why their abilities interfered with one another's.