1827 opened in a rented pastry shop at 23 William Street
Opened by Italian-Swiss immigrants, the brothers Giovanni and Pietro Delmonico. In 1831, they were joined by their nephew, Lorenzo, who eventually became responsible for the restaurant's wine list and menu.
The brothers moved their restaurant several times before settling at 56 Beaver Street (also 2 South William Street). The building was opened on a grand scale in August 1837 after the Great Fire of New York.
The business was so successful that from 1865 to 1888, it expanded to four restaurants of the same name. At various times, there were Delmonico's at ten locations. The most famous was at the corner of Fifth Avenue and 26th from 1876 to 1899 and was dubbed the most elegant restaurant in the Western Hemisphere. Lobster Newburg among many other dishes was created in its kitchen.
The restaurant attracted the social elite in Manhattan, prominent politicians, and celebrities, such as Lana Turner, Marilyn Monroe, Rock Hudson, Lena Horne, Elizabeth Taylor, Elvis, Etta James, JFK, Jackie Kennedy Onassis, and others.