A Samurai sword and a cutlass were among hundreds of knives handed in to police stations across Derbyshire during a recent knives amnesty. Last month special bins were placed in all police stations for people to hand in knives and other offensive weapons without fear of further action.
More than 800 knives, bladed weapons and swords were given in.
Police said the amnesty would make it harder for knives to fall into the hands of criminals.
Deputy Chief Constable of Derbyshire Police, Alan Goodwin, said: "We realise that many law-abiding people have handed in knives or ornamental swords they do not want.
"These may have been family heirlooms or souvenirs that the owners would not have used for violence, but by handing them in it has reduced the possibility that they could be stolen and used by criminals.
"Our aim is to use all possible methods to make the streets of Derbyshire safer."