 Complete the following phrase:  Lobanov-Rostovsky ultimately sold Szczerbiec to Prince Anatoly Demidov, who kept it together with the rest of the Demidov collection in his Villa San Donato near Florence. In 1870, the sword was bought for 20,000 French francs by Alexander Basilevsky, Russian ambassador to France and great art collector. In 1878, he displayed Szczerbiec at the 