Pyramid of Sesheshet
Egypt
Sesheshet, occasionally known as Sesh, was the mother of King Teti, the first and founding king of the Sixth Dynasty of Ancient Egypt. She was instrumental in enabling her son to gain the throne and reconciling two warring factions of the royal family. In 2008, archeologists discovered what is believed to have been her pyramid.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).