The U.S. Supreme Court let stand a ruling that Spain owns the remains of two of its warships that sank off the Virginia coast hundreds of years ago, handing a setback to a treasure-hunting, maritime salvage company. Virginia asserted ownership of the shipwrecks of the Spanish Royal Naval vessels -- La Galga, which sank in 1750, and Juno, which went down in 1802. Virginia issued Sea Hunt, a salvage company, permits to recover artifacts from the wrecks. But Spain then filed a claim asserting ownership over the shipwrecks, citing a 1902 treaty between the United States and Spain protecting shipwrecks and military gravesites. Under the treaty, vessels may be abandoned only by express acts. A U.S. appeals court ruled last year that the two ships belonged to Spain.