This is the most impressive of Alexandria's ancient remains, dating from the 2nd century AD. Excavation started in 1892, and the catacombs were discovered accidentally eight years later when a donkey fell through a chamber ceiling. A long spiral staircase leads to the main hall. The stairs run down the outside of a shaft, which excavators used to transport the bodies of the dead. The staircase leads to the rotunda, which, like all but the lowest chamber, is undecorated but striking for the sheer scale of the underground space, supported by giant columns carved out of the bedrock.
A few rooms branch off from the rotunda: the Triclinium was a banquet hall where relatives and friends toasted the deceased, and the Caracalla Hall has four lightly painted tombs and a case of bones. The next level down contains a labyrinth of smaller nooks for storing bodies and leads to the lowest excavated room, which is framed by columns and sculpted snakes. Casts of two statues stand here—the originals are in the Greco-Roman Museum—and three tombs are of interest for their mix of pharaonic and Greek imagery.