Decoration on Dome
Kaunghmudaw Paya, Amarapura
The gold "lozenges" (tongue-shaped decorations in the lower bands) represent lotus petals; the gold decorations on top, that are shaped like upside-down hearts, represent pipal leaves.
The lotus symbolizes spiritual purity, since the stem that bears its beautiful flower grows up out of the mud. Buddha and the Hindu gods are usually shown in art as sitting, or standing, on lotus thrones. The pipal leaf symbolizes Buddha's enlightenment, which he attained while meditating underneath a pipal tree.
Finally, since the stupa itself represents Buddha's body, the whole construction can be taken as an abstract representation of the enlightened Buddha, sitting on a lotus throne and meditating underneath the tree.