rome water rome trevi fountain one italy top tourist attractions turn red thursday man dump dye main pool city official say police detain man responsible statement mayor office say city officials assess damage 18th century landmark fountain toss coin pool suppose superstition guarantee one return eternal city big tourist attraction rome actress anita ekberg famously frolic fountain pool 1960 film la dolce vita act like demonstrate ignorance total lack civic sense deputy mayor luca bergamo say italian media say culprit person dye fountain red 2007 protest cost city host international film festival thursday action take place open day rome 2017 film festival rome 's trevi fountain run red man pour dye water