Police officers and two prosecutors seized an ancient limestone bas-relief from the booth of a London dealer at The European Fine Art Fair (TEFAF) New York Fall fair on Friday, reports the New York Times. The prestigious, vetted fair is on view at the Park Avenue Armory in Manhattan.

The piece depicting a Persian soldier, which once adorned a building in the ruins of Persepolis in Iran, was valued at around $1.2 million and offered by renowned antiquities dealer Rupert Wace.

Wace said in a statement that the piece was purchased from an insurance company, and had been purchased legally from a museum in Montreal, where it had been on display since the 1950s.