The purpose of the present contribution was to give in a didactic way a general description of fundamental civilizational facts of religious nature during Antiquity, in a comparative perspective approach to events concerning the explanation of Buddhism consolidation in central Asia, as has been seen at the time by Chinese monks that left their country so they could visit the lands where Buddhism had begun, in India and Nepal, or even Afghanistan. Dating from the 5 th to the 7 th Century, these monks left their own written record of what they have seen with their own eyes, what they have heard and learned through active debates with Indian Masters, telling also the efforts regarding the search for fundamental texts, which came to be obtained and kept for the voyage back to China. The most eminent of such travellers were Faxian, Sung Youn, Xuanzang and Yijing, which must be seen as pivotal figures that promoted the expansion of Buddhism towards East, some of them translating into Chinese the texts they had previously got.