Torretta is a comune in the Metropolitan City of Palermo located on the Mediterranean island of Sicily. This town is situated on a mountainou…Torretta is a comune in the Metropolitan City of Palermo located on the Mediterranean island of Sicily. This town is situated on a mountainous area overlooking Palermo. Olive production is Torretta's primary agriculture product and other industries include aluminum and marble. Monuments include the Santuario della Madonna delle Grazie of XVII. Churches include the Chiesa del Sacramento and the Chiesa and the Monastero del Collegio di Maria.