Delmonico's is the name of a series of restaurants that operated in New York City, and Greenwich, Connecticut with the present version located at 56 Beaver Street in the Financial District of Manhattan. The original version was widely recognized as America's first fine dining restaurant. Beginning as a small cafe and pastry shop in 1827 at 23 William Street, Delmonico's eventually grew into a hospitality empire that encompassed several luxury restaurants catering to titans of industry, the political elite and cultural luminaries. In many respects, Delmonico's represented the genesis of American fine dining cuisine, pioneering numerous restaurant innovations, developing iconic American dishes, and setting a standard for dining excellence. Delmonico's shuttered all locations by 1923. In 1926, Delmonico's under new ownership by Italian immigrant Oscar Tucci reopened at 56 Beaver Street.

56 Beaver Street is a structure in the Financial District of Manhattan in New York City, United States. Designed by James Brown Lord, the building was completed in 1891 as a location of the Delmonico's restaurant chain. The current building, commissioned by Delmonico's chief executive Charles Crist Delmonico, replaced Delmonico's first building on the site, which had been built in 1837. The building is a New York City designated landmark and a contributing property to the Wall Street Historic District, a National Register of Historic Places district.