Buddhism is the second oldest religion in Indonesia, arriving around the sixth century. The history of Buddhism in Indonesia is closely related to that of Hinduism, as some empires based on Buddhist culture were established around the same period. The Indonesian archipelago has witnessed the rise and fall of powerful Buddhist empires such as Sailendra dynasty, Srivijaya and Mataram Empires. The arrival of Buddhism was started with trading activities that began in the early first century on the Silk Road between Indonesia and India. According to some Chinese sources, a Chinese monk on his journey to India, witnessed the powerful maritime empire of Srivijaya based in Sumatra. The empire also served as a Buddhist learning centre in the region. Some historical heritage monuments can be found in Indonesia, including the Borobudur Temple in Yogyakarta and statues or "prasasti" (inscriptions) from the earlier history of Buddhist empires.