Pompey’s Pillar is one of Alexandria’s most iconic ancient landmarks, standing as the largest triumphal column constructed outside the imperial capitals of Rome and Constantinople. Carved from a single block of red Aswan granite, this massive monument reaches nearly 27 meters in height and was erected in the late 3rd century AD to honor Emperor Diocletian. The pillar stands amidst the ruins of the Great Serapeum, once the city’s most magnificent temple dedicated to the god Serapis. Visitors can explore the archaeological site, which includes ancient sphinxes, subterranean galleries used for sacred burials, and the foundations of the legendary "Daughter Library" of Alexandria. It offers a powerful testament to the grandeur of the Roman era in Egypt.