Delmonico's, the New York City steakhouse, has been around forever.
The New York Public Library's archival menu collection doesn't go back quite that far. But it does have a Delmonico's menu from 1918. The archive also, sort of randomly, has a Delmonico's menu from 1988. Delmonico's current menu is online.New York Public Library
One item that's on all three menus: filet mignon. This allows us to ask an interesting (to us) question: How has the price of filet mignon changed over the past century? Here's the answer, adjusted for inflation.