An ancient Greco-Roman theater not based on a particular theater, and takes elements from both ancient greek and roman theater designs.
Contains a skene and proskenium, orchestra, thymele and theatron. (You can read about all these parts of the theater here, if you are so inclined.)

It can be placed as a free-standing structure if you want a more Roman style, or embedded into a hill for a more Greek style. In order to make it fit into the side of a hill without carving out to the schematic corners, you can add the "water backing" schematic, line it up to the back of the theatron. (Make sure the "copy air" box is unchecked.) Then place both parts into the hill where you want it. (Make sure that "copy air" is checked, but "copy water" is not checked for the final paste. One of the screenshots shows what this looks like when it's done.

59W x 62L x 29H
Built using MCEdit.

I welcome your comments and suggestions. If you use this schematic in your world, I would love to see a screenshot of the area!