Wikipedia
Delmonico's is the name of various New York City restaurants of varying duration, quality, and fame.
The original and most famous was operated by the Delmonico family at 2 South William Street in Lower Manhattan, during the 19th and early 20th centuries, when it gained a reputation as one of the nation's top fine dining establishments. The birthplace of the widely imitated Delmonico steak, the restaurant is credited with being the first American restaurant to allow patrons to order from a menu à la carte, as opposed to table d'hôte. It is also claimed to be the first to employ a separate wine list.
The family also opened other restaurants under the name, operating up to four at a time and ultimately totaling 10 establishments by the time it departed the business in 1923.
In 1927, restaurateur Oscar Tucci purchased the entire 70,000 square foot building at 56 Beaver Street. First opening a speakeasy, in 1933, after the repeal of Prohibition, he opened Oscar's Delmonico. Other Delmonicos have operated in the space from 1981 to 1992 and since 1998.