The Old Treasury is a vintage jewelry business active since 1993, run by mother-and-daughter team Miriam and Laura Schmitz. The brand specializes in signed jewelry from the 20th century alongside distinctive modern designs, with each piece selected by Laura, a certified jewelry valuer and gemologist. Its collection is chosen for exceptional quality and character, whether that comes from an unusual design, unconventional materials, or a lesser-known maker. The team also shares the stories behind the jewelry.

The collection is organized around three areas. Fine jewelry from couture houses such as Chanel, Louis Vuitton, and Gucci features 18-karat gold and fine gemstones. Vintage Italian pieces date mainly from the 1950s through the 1980s and come from ateliers that often produced work for renowned houses including Bulgari, Cartier, and Van Cleef & Arpels. The Old Treasury also offers rare and less commonly seen classics from established jewelry houses such as Cartier, Bulgari, and Tiffany & Co.