In the latter case, the antechamber lies on the vertical axis of the pyramid, with the burial chamber to its west. The chamber(s) had a ceiling constructed from three gabled layers of limestone blocks, which dispersed the weight from the superstructure onto either side of the passageway preventing collapse. Perring estimated the largest blocks to be long, wide and thick. Despite their size and weight, all but two have been broken. Inside the apartment's ruins, Perring found stone fragments – the only discovered remains of the burial – which he believed belonged to the king's basalt sarcophagus.