This chapter explores the urban and architectural evolution of Ravenna in Late Antiquity, focusing on its transformation from a relatively modest Roman settlement into a major political and religious centre. It examines how Ravenna served as the capital of the Western Roman Empire, the Ostrogothic Kingdom and the Byzantine Exarchate of Italy between 400 and 725 CE. The discussion highlights how Ravenna’s geographical setting – a marshy coastal landscape – shaped its urban development and archaeological record. The study assesses the city’s infrastructure, including its walls, aqueducts, palaces and religious buildings, demonstrating how imperial patronage played a decisive role in its growth. The construction of monumental churches such as the Basilica of San Vitale and Sant’Apollinare in Classe is explored as evidence of Ravenna’s rising Christian prominence. The chapter also details the impact of Theoderic’s rule, particularly in the adaptation of Roman architectural traditions for Ostrogothic purposes. Under Byzantine rule, Ravenna became a centre of ecclesiastical power, reflected in continued church-building projects. Despite political upheavals and economic fluctuations, Ravenna remained a dynamic and influential city. The chapter concludes by pointing out the challenges of archaeological research in the area, emphasising how ongoing excavations continue to refine our understanding of Ravenna’s late antique legacy.