Siracusa - Lighthouses and observation points Tonnara di Santa Panagia The Tonnara di Santa Panagia was built in the eighteenth century, after the earthquake of 1693, although its origins date back to 1100. In the second half of the twentieth century, it became inactive after fishing for tuna was introduced through flying nets and the proposition of various chemical industries in the nearby area. Unfortunately, today the tonnara is in a deteriorating condition, even though projects have been set up for its restructuring.