Butterfly composed with Sierpinski's triangle in the Garibaldi elementary school in Genoa a.s. 2004-2005 in a Learning Unit promoted by OPPI on the Sierpinski triangle created by Ivana Niccolai and Grazia Raffa (Tartapelago: <a rel="nofollow" class="external free" href="http://www.maecla.it/tartapelago/testuggine/farfallaivana.htm">http://www.maecla.it/tartapelago/testuggine/farfallaivana.htm</a> )
<a href="//commons.wikimedia.org/wiki/User:Giorgio_Pietrocola" title="User:Giorgio Pietrocola">Giorgio Pietrocola</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>