The Art Loss Register has been succesful in returning an Etruscan bronze stolen from the Archaeological Museum in Siena along with other items in 1988.
The bronze was offered for sale unwittingly by a UK auction house. The consignor then renounced his title. It was then returned at a ceremony at the British Embassy in Rome.
The British School later tweeted: “Presentation of two Etruscan artefacts at the British Embassy by @JillMorrisFCO and @MarkLancasterMK to the @_Carabinieri_ one of which was stolen over 30 years ago from Siena. Both objects were recovered by the London Met Police.” See original tweet.
Details of the Art Loss Register can be found here