Widows, children and grandchildren of many of those slain by various mafia groups rallied in Naples to protest organized crime.
The annual march on the first day of spring drew thousands of participants along Naples' waterfront.
A priest who runs a group called Libera, or "Free," organizes the march and helps citizens fight organized crime.
Judges, prosecutors and police officers are among those slain over the decades by Cosa Nostra, the Camorra and the 'Ndrangheta, the three big crime syndicates based in the south. Priests, union leaders and journalists who have denounced the mafia, as well businessmen who refused extortion demands, have also been killed.