The Pyramid of Caius Cestius, an ancient pyramid, near the Porta San Paolo and the Protestant Cemetery, Rome, Lazio, Italy, Europe

The Pyramid of Caius Cestius, an ancient pyramid, near the Porta San Paolo and the Protestant Cemetery, Rome, Lazio, Italy, Europe

Looking down on Gonville and Caius College, Cambridge, Cambridgeshire, England, United Kingdom, Europe

Senate House Passage, Gonville and Caius College on left and Senate House on right, Cambridge, Cambridgeshire, England, United Kingdom, Europe

High angle view of the skyline of the city of Cambridge showing university buildings in Caius, Trinity and St John's colleges, Cambridge, Cambridgeshire, England, United Kingdom, Europe

Roman statue of General Caius Billienus, Delos Island, UNESCO World Heritage Site, Cyclades Group, Greek Islands, Greece, Europe