Meidum, Maydum or Maidum is an archaeological site in Lower Egypt. It contains a large pyramid and several mudbrick mastabas. The pyramid was Egypt's first straight-sided one, but it partially collapsed in ancient times. The area is located around 72 kilometres (45 mi) south of modern Cairo.

A mastaba, also mastabah or mastabat) is a type of ancient Egyptian tomb in the form of a flat-roofed, rectangular structure with inward sloping sides, constructed out of mudbricks or limestone. These edifices marked the burial sites of many eminent Egyptians during Egypt's Early Dynastic Period and Old Kingdom. Non-royal use of mastabas continued for over a thousand years.