Opportunity or responsibility? Privilege or achievement? Defining citizenship is like putting together a jigsaw puzzle in which belonging and identity, rights and duties, nations and individuals fit together. Viewed through the prism of history, the word "citizen" reveals all its colours, sometimes blurred, sometimes contrasting. And it tells us the best-kept secret of the Risorgimento: a handful of citizens of the world, adventurous, bilingual and with more than one passport who built a united Italy. Like Garibaldi and Anita Ribeiro.