Core Readings:
Greco-Buddhist art – Wikipedia https://en.wikipedia.org/wiki/Greco-Buddhist_art
15 pages, thickly illustrated This essay looks at of the Greek influence on Buddhist art in Bamyan, Bactria and throughout Central Asia, which Xuanzang would have seen in many locations, and which Aurel Stein sought after.
For Further Reading:
Indo-Greek Kingdom https://en.wikipedia.org/wiki/Indo-Greek_Kingdom. A long, well illustrated discussion of one of the states established by Alexander and his successors in Central Asia.
Gandharan Sculpture from Pakistan Museums https://ia801304.us.archive.org/26/items/in.gov.ignca.41658/41658.pdf