In a survey that spans the life of these ubiquitous messengers, Sign of theTimes: The Great American Political Poster 1844–2012 explores a variety of styles, design trends, and printing technology that will delight your eye, engage your imagination, and lead you to ruminate over past political commitments. Sign of the Times features the most exciting and rarely seen posters created in the last 170 years and opens May 26 and runs through June 20.