One of New York’s most prominent antiquities dealers was arrested Wednesday on charges that she obtained millions of dollars in stolen artifacts from international smugglers and sold them illegally — often through major auction houses — by creating fraudulent documents to camouflage their history.

In a complaint filed in Manhattan Criminal Court, prosecutors with the district attorney’s office say that the dealer, Nancy Wiener, and several co-conspirators have trafficked in illegal antiquities since at least 1999. Prosecutors say the charges arose from months of interviews with confidential informants, an examination of thousands of emails and other seized documents, and years of investigations into international smuggling networks. The authorities raided Ms. Wiener’s gallery in March.

“Defendant used a laundering process that included restoration services to hide damage from illegal excavations, straw purchases at auction houses to create sham ownership histories, and the creation of false provenance to predate international laws of patrimony prohibiting the exportation of looted antiquities,” according to the complaint. Ms. Wiener, who faces felony charges of criminal possession of stolen property and conspiracy, was released after posting $25,000 in bail.

Ms. Wiener’s lawyer, Georges G. Lederman of Pearlstein McCullough & Lederman, said his client “surrendered voluntarily” and added, “We are examining the charges and will respond at the appropriate time.”