The earliest known magazines were invented in the 1600s, beginning with a German publication in 1663. However, magazines did not become widely popular until the 1700s and 1800s. In 1731, the first magazine aimed at the general public was published in England. In the 1800s, magazines began including illustrations and photos to increase sales and popularity. Magazines were first published in America in 1741 and over 100 existed by the late 1700s, though they were initially only affordable to the wealthy. More affordable magazines for the general public emerged in the 1830s with a focus on entertainment. Special interest magazines proliferated in the late 1800s as literacy increased in America.