In 2019, Egyptian archaeologists found what looked like a pie-shaped, Graeco-Roman structure of red bricks in Northern Sinai. At the time, the team concluded that they’d found seats for the Senate ruling over the ancient city of Pelusium. But it turned out that the researchers only had a small slice of the whole picture—literally. The full building was an entirely circular basin about 115 feet (35 meters) in diameter, with a square pedestal in the middle. Various channels and water tanks encircle the site, and archaeological layers suggest that ancient people used the facilities from the 2nd century BCE to the 6th century CE. After extensive consultations with outside experts, the archaeological team concluded that the site wasn’t a government building but a temple presumably dedicated to the local god Pelusius. A full view of the shrine.…