The museum is articulated in three layers, a base, a middle zone, and a top. The musuems' entrance is in the base, where glass floors hover over the excavation site on more than 100 concrete pillars, placed so as not to damage the remains. A glass ramp leads to a the middle section's double-height space, featuring the musuem's permanent collection galleries from the Archaic to the late Roman period, and a public terrace. This space is topped by the Parthenon Gallery, a glass-enclosed rectangle that is rotated 23 degrees from the rest of the building in order to align with the Parthenon. The gallery boasts 360-degree views of the ancient temple and features its frieze on a concrete core at its center.
