Greater India was the historical extent of Indian culture beyond the Indian subcontinent. This particularly concerns the spread of Hinduism and Buddhism from India to Southeast Asia, Central Asia and China by the Silk Road during the early centuries of the Common Era, and the spread of the Indian writing systems like the Pallava script of the south Indian Pallava dynasty to Southeast Asia and Siddhaṃ script to East Asia through Gupta Empire. by the travellers and maritime traders of the 5th to 15th centuries. It also describes the establishment of Indianised Kingdoms in Southeast Asia and the spread of the Indian script, architecture and administration. To the west, Greater India overlaps with Greater Persia in the Hindu Kush and Pamir Mountains. The term is tied to the geographic uncertainties surrounding the "Indies" during the Age of Exploration.