Gresham College, named after Sir Thomas Gresham, has been giving free lectures for some 400 years. Over 2,000 audio and/or video lectures given since 2001 are available on the site for free, on-demand streaming or download approximately two weeks after they have been given. The main subject areas are Art & Literature, Medical Science, Business, History, Law, Mathematics, Music, Politics, Religion, Science, and Unusual, which includes Media, Education, Climate Change and others. Results can also be filtered by subcategories. For example, there is a section on Film under the Arts & Literature category, and a section on Film Music under the Music category. The lectures last, on average, between 25 minutes and a little under an hour. They all have a good number of chapters and a fair amount of information is given on the site as well as transcripts and links to related materials. The content can also be browsed via the tab Watch which contains four groupings: All Past Lectures, Series, Shorts and Short Series.