Due ripostigli di tarì arabo-normanni dalla provincia di Ragusa: Spaccaforno e Modica 1907

This paper analyses the Sicilian Norman tar?`belonging to two important hoards (Spaccaforno, 1909 and Modica, 1907), unhearted in the province of Ragusa (Sicily), which are now part of the coin collection of the Archaeological Museum ''Paolo Orsi'', Syracuse.