Cal. Civ. Proc. Code § 338
Within three years:
(c)
(3)
(A) Notwithstanding paragraphs (1) and (2), an action for the specific recovery of a work of fine art brought against a museum, gallery, auctioneer, or dealer, in the case of an unlawful taking or theft, as described in Section 484 of the Penal Code, of a work of fine art, including a taking or theft by means of fraud or duress, shall be commenced within six years of the actual discovery by the claimant or the claimant’s agent, of both of the following:
(C) For purposes of this paragraph:
(f)