Ancient Roman architecture varying purposes and differed in design and construction. Along with theatres and amphitheatres, Circuses were one of the main entertainment sites of the time. Circuses were venues for chariot races, horse races, and performances that commemorated important events of the empire were performed there. For events that involved re-enactments of naval battles, the circus was flooded with water. The performance space of the Roman circus was normally, despite its name, an oblong rectangle of two linear sections of race track, separated by a median strip running along the length of about two thirds the track, joined at one end with
Entertainment and the entertainment industry. In the 21st century, as with adult products, much entertainment is available for children on the internet for private use. This constitutes a significant change from earlier times. The amount of time expended by children indoors on screen-based entertainment and the "remarkable collapse of children's engagement with nature" has drawn criticism for its negative effects on imagination, adult cognition and psychological well-being.<ref name="http://www.guardian.co.uk/commentisfree/2012/nov/19/children-lose-contact-with-nature"></ref> Banquets have been a venue for entertainment since ancient times, continuing until the 21st century, when they are still being used for many of their original purposes to impress visitors, especially important ones