In a pre-email, texting, facebook, Twitter, kind of world, before long-distance telephoning, when radio, film and television were infant means of communicating, the short, informal messages of postcards flourished. And the most creative messages of all were often conveyed with both pictures and words in the form of picture postcards.

In the years following Eastman Kodak’s 1900 introduction of the Brownie camera, which was initially marketed to children but quickly became a popular accessory for almost any middleclass family member, informal snapshots became the currency of popular photographic expression. And as the popularity of photography grew, so did the desire to send photographs and receive them. In 1903 Kodak introduced the No. 3A Folding Camera that used postcard-size film and allowed the general public to take photos and have them printed on postcard backs. Photo-lithography enabled the larger business of mass produced postcards to follow. Entrepreneurial photographers traveled the globe to record tourist spots, news events, important people, natural wonders and nature’s disasters, and turned the results over to printing companies that produced thousands of images every year.

Beyond their most familiar use as illustrated travel mementoes, picture postcards documented all manner of things for all kinds of reasons. Realtors used postcard photographs of important buildings and city sites to sell new housing by writing descriptions and prices on the back. Postcard images of particular places and people became expressions of pride in home and community, and were sold as souvenirs in local drug stores and stationery shops. Postcards of scenes in Africa, the Middle East, and Asia made by and for a Western audience in Europe and America also enjoyed a great popularity, especially before World War I. In the United States at the end of the mid-nineteenth-century, photographer William Henry Jackson, an experienced western US survey photographer, formed the Detroit Publishing Company. Postcards, sometimes in boxed sets, comprised most of the seven million images issued by the company in an average year. Images of American farms, factories, cities, natural wonders, and those ubiquitous favorites, cowboys and Indians, were marketed worldwide to schools, libraries, and governments, as well as to individuals.

Postcards formed a kind of floating image library. The United States Post Office reported that from June 1907 to June 1908 more than 667 million postcards, many of them picture postcards, were sent. Mailed and collected, they functioned as illustrated magazines. Photographic postcards, and the images they carry, represent a diverse range of impulses and intentions. At the Smithsonian some support collections of exploration and experiment, others serve collections of natural science, and some are illustrations of a unique personal view. The message has changed over time and we know that “wish you were here” is a complicated thought. But, by card or “tweet,” we wish the connection or lessons of memory all the same. View more postcards from the Smithsonian's collections.

Merry Foresta is the Former Director of the Smithsonian Photography Initiative.