The Gentleman's Magazine was a monthly magazine founded in London, England, by Edward Cave in January 1731. It ran uninterrupted for almost 200 years, until 1922. It was the first to use the term magazine for a periodical. Samuel Johnson's first regular employment as a writer was with The Gentleman's Magazine.
Front page of The Gentleman's Magazine, May 1759
Top half of Volume One, Issue One, published January 1731
A magazine is a periodical publication, generally published on a regular schedule, containing a variety of content. They are generally financed by advertising, purchase price, prepaid subscriptions, or by a combination of the three.
German print magazines
Front cover of 1 October 1892 issue of The Illustrated London News
La Gazette, 26 December 1786
The Olympic Number of Life, 10 July 1924. Issues of general interest magazines focused on a specific subject were referred to as "numbers" and featured cover art relevant to the given topic, in this case the 1924 Summer Olympics.