Calatafimi, a town of the province of Trapani, Sicily, 30 m. W.S.W. of Palermo direct (51½ m. by rail). Pop. (1901) 11,426. The name of the town is derived from the Saracenic castle of Kalat-al-Fimi (castle of Euphemius), which stands above it. The principal church contains a fine Renaissance reredos in marble. Samuel Butler, the author of Erewhon, did much of his work here. The battlefield where Garibaldi won his first victory over the Neapolitans on the 15th of May 1860, lies 2 m. S.W.