The first food pyramid was introduced in 1992 by the USDA, which replaced it now with MyPlate (see below).
Below is the new MyPlate. It shows a plate with the recommended distribution of different nutrients. In my opinion, the plate is much easier to understand than the pyramid as it shows you what your plate should look like. One only wonders if the powerful US dairy industry shoehorned in "Dairy" as being separate from "Protein".
USDA Ditches Food Pyramid for a Food Plate | Geekosystem