As Buddhism moved into China along Silk Road trade routes in the early centuries CE, the South Asian stupa met an existing Chinese architectural tradition of multi story timber watchtowers, and the pagoda emerged from the fusion, keeping the stupa's function of enshrining relics while adopting an entirely different silhouette, a tall stack of diminishing stories rather than a single dome. Early Chinese pagodas were built largely in wood, a material that burns and rots, so the oldest substantial surviving examples, such as the eleventh century Yingxian Wood Pagoda in Shanxi province, are exceptional survivals rather than typical of what once existed; brick and stone construction became more common precisely because it endured better.
The form traveled onward to Korea and Japan, where Horyu-ji temple near Nara preserves a five story wooden pagoda among the oldest wooden buildings anywhere in the world. Structurally, many East Asian pagodas rely on a central wooden pillar and interlocking bracket systems that allow the whole tower to flex slightly during earthquakes rather than fracture, an engineering solution independently developed centuries before comparable seismic design elsewhere. Despite the dramatic change in silhouette from dome to tower, the pagoda's spire, built of stacked disks narrowing toward a point, is understood as a direct, if miniaturized, descendant of the stupa's original parasol finial.