By far the most famous part of the Erechtheion is what is called "the porch of the maidens." The columns upholding the porch are six finely-sculptured maidens, called caryatids.
Although beautiful, they give the impression that holding up part of a building with their heads is no problem at all. These statues are replicas. Five of the originals are in the Acropolis Museum, and the sixth was swiped by good old Lord Elgin while he was helping himself to the Parthenon Marbles. He apparently tried to remove another one but ran into technical difficulties. He tried to saw it into pieces, but this smashed the statue and he just left the fragments lying there. An attempt was made later to reconstruct it.
The caryatids are not replicas of one another, but individually carved with variations in hair style and costume. Three of them stand with the right leg forward, and three with the left leg.