Royalty of late Mughal India

The 17th century jewel-encrusted spectacles, which feature lenses made from diamond and emerald rather than glass originally belonged to royals in the Mughal Empire. (Sotheby's)

The lenses in one pair, known as the "Halo of Light" spectacles, are believed to have been cleaved from a single 200-carat diamond found in Golconda, a region in the present-day Indian states of Andhra Pradesh and Telangana; in India.