Three symbols of Native America--the bison, the eagle and the Native American people themselves--have been endangered in recent decades.

NPR: Native American Symbols: Eagle, Bison Reclaimed

Of course, companies should usually have at least two or three symbols to choose from in case their first choice is taken or rejected.

FORBES: The Evolution of Ticker Symbols

Along with the focus on the development of culture in Bosnia and Herzegovina, the Programme supported the rehabilitation of three symbols of multiculturalism: the Orthodox Church in Mostar, the Ferhadija Mosque in Banja Luka, and the Monastery in Plehan near Derventa.

UNESCO: Sarajevo conference showcases the importance of improving intercultural dialogue, restoring symbols of multiculturalism and fostering intercultural education | United Nations Educational, Scientific and Cultural Organization

The Enterprise and three other shuttles in NASA's fleet were sought by several cities as potent symbols and tourist draws.

WSJ: A Shuttle Meets Its City