The eightfold path shown by the Buddha in the middle of the first millennium bce was founded on wisdom, morality, and concentration. Like other contemporary Indic religions, Buddha dhamma had no central organization, nor did it follow a single text as its guiding principle. Its core principle was refuge in the Buddha, the Dhamma, and the Sangha, though as it expanded across Asia, it absorbed local traditions, responded to historical factors, and evolved philosophically. The physical manifestations of the dhamma appeared in the archaeological record at least two hundred to three hundred years later, in the form of inscriptions, stūpas, images, and other objects of veneration. Relic and image worship were important factors in the expansion of Buddhism across the subcontinent and into other parts of Asia. This essay is framed. Four themes are significant in the archaeology of Buddhism: the history of archaeology in Asia with reference to Buddhism; defining a chronology for the historical Buddha and sites associated with Buddhism; identifying regional specificities and contexts for Buddhist sites as they emerged across Asia; and finally addressing the issue of interconnectedness and interlinkages between the various sites within the Buddhist sāsana. The active participation of learned monks and nuns in the stūpa cult and their mobility across Asia is a factor that is underscored in this paper.