Short answers, pulled from the story.
The first art appeared during the Upper Paleolithic period. This era marks the beginning of a human tradition where early humans used art to register their relationship with the world before the invention of writing or the construction of cities.
The seven traditional forms of art are painting, architecture, sculpture, literature, music, theatre, and filmmaking. Francophone scholarship sometimes adds television as the eighth art and comics as the ninth art to this traditional list.
John Cage composed Living Room Music in 1940. This work was a quartet for unspecified instruments that were actually non-melodic objects found in a typical house living room.
Classical ballet emerged in the 17th century. During this period, orchestral music combined with dance to create a temporal product performed over a period of time.
The National Endowment for the Arts included video games in its definition of a work of art in 2011. The Smithsonian American Art Museum subsequently presented an exhibit titled The Art of the Video Game in 2012.
The term Gesamtkunstwerk means synthesis of the arts. Richard Wagner used this word to describe his cycle Der Ring des Nibelungen, which combined many artistic disciplines into a single work of opera.