ROME, ITALY—Excavations beneath the arched entrances to the Colosseum by archaeologists and students from Roma Tre University and the American University of Rome revealed late medieval dwellings, including terracotta sewage pipes, pottery, and foundations of a twelfth-century wall. A tiny monkey figurine carved from ivy was also found—it may have served as a chess piece. “This excavation has allowed us to identify an entire housing lot from the late medieval period,” Rossella Rea, director of the Colosseum, told Discovery News. At that time, the monument was controlled by friars who rented space for housing, stables, and workshops, turning the arena into a huge courtyard. The residents moved out when the Colosseum was seriously damaged by an earthquake in 1349.