I created this timeline of the history of theater so I could have a visual to show my students in my theater classes. You could use this as a powerpoint to teach a brief theater history. However, I printed all the slides so they are each 1 page, laid them side to side, taped the backs and laminated them to get a REALLY long (about 24 feet) poster that spans the wall above my white board. My students actually reference it quite often when we are discussing theater topics! It is by no means comprehensive but it gets the highlights well.