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G3-b (also G3b, G3 b, GIIIb) is one of the three satellite pyramids of the larger Pyramid of Menkaure, located at the Giza pyramid complex. Situated south of the main pyramid between satellites G3-a and G3-c, this structure contained the body of a woman.
The pyramid was built during the Fourth Dynasty of Egypt, presumably for one of the wives of Menkaure. The AmericanarchaeologistGeorge Andrew Reisner has speculated that the queen buried in the pyramid may have been Menkaure's half-sister, Shepsetkau, the daughter of Meresankh III and Khafre. The surface of the pyramid is stepped, consisting of four platforms that decrease toward the top. The pyramid's base is 31.24 metres (102.5 ft) square.
Reisner, George Andrew (1942). A History of the Giza Necropolis. Vol. III. Harvard University. (Note: This is the second unpublished follow-up to Reisner's work A History of the Giza Necropolis Vol. I, published by Harvard University Press)