Portraits of presidents of the United States

Beginning with painter Gilbert Stuart's portrait of George Washington, it has been tradition for the president of the United States to have an official portrait taken during their time in office, most commonly an oil painting. This tradition has continued to modern times, although since the adoption of photography as a widely used and reliable technology, the official portrait may also be a photograph (or at least a photograph may be viable).

Source: Wikipedia — Portraits of presidents of the United States (CC BY-SA 4.0)