Triskele stone,
from Coeliobriga
Another triskele relief stone,
from Lansbrica
More pedras formosas, clockwise from top left:
Sardoura, Altos das Eiras, Galegos, Tongobriga
Architectural floral pattern
Running legged triskele coin, Portugal. This symbol is especially associated with Sicily where it appears on ancient coins and art.
Stones with spirals and whorls
Spirals, rosettes, wheels