The Roman Empire was among the most powerful economic, cultural, political and military forces in the world of its time, and it was one of the largest empires in world history. At its height under Trajan, it covered 5 million square kilometres. The Roman legacy has deeply influenced Western civilisation, shaping most of the modern world; among the many legacies of Roman dominance are the widespread use of the Romance languages derived from Latin, the numerical system, the modern Western alphabet and calendar, and the emergence of Christianity as a major world religion. The Indo-Roman trade relations, beginning around the 1st century BCE, testify to extensive Roman trade in far away regions; many reminders of the commercial trade between the Indian subcontinent and Italy have been found, such as the ivory statuette Pompeii Lakshmi from the ruins of Pompeii.