The police said an Icon of Our Lady of Iver had been returned by members of the antique community.
The icon brings the total number returned artifacts to 13. Two of them were returned by antique aficionados in Moscow after a list of the stolen items was published on the Hermitage's Web site. Another icon was found in a trash bin last Thursday after police hunting for the missing treasures received a tip from an anonymous caller. A 19th-century chalice was returned the next day.
The Hermitage in St. Petersburg, which boasts one of the richest art collections, said after a routine inventory check in late July that 221 items worth $4.85 million had gone missing from storage, including icons, medieval and 19th-century jewelry, silverware and enameled objects.
Museum officials said staff members were likely to have been involved in the theft as only insiders had access to the museum's storerooms. The curator in charge of the missing items died suddenly when the check that identified the stealing began.
The police have detained three people in connection with the theft, including the husband and son of the late curator.
On Tuesday, Russia's cultural heritage watchdog reported the theft from state archives of scores of drawings and graphic designs by Yakov Chernikhov, a famous Soviet-era constructivist architect and author of a series of avant-garde art books.
The theft was revealed after nine Chernikhov drawings were sold at Christie's on June 22.
The watchdog said the stolen items could be worth several million dollars and added that 274 Chernikhov drawings worth $1.3 million had already been regained from antiques markets in Russia and abroad.
