the upside of down
The Upside of Down includes a detailed treatment of the amount of energy needed to build the Roman Colosseum and to run the Roman empire.
For interested readers, details of these calculations are available at the following links:
A summary of the project’s logic, calculations & results: Colosseum Project Walkthrough
Details of the calculations in spreadsheet form: Colosseum Calculations
A list of assumptions underlying these calculations: Colosseum Calculation Assumptions
Karen Frecker’s sensitivity analysis of her calculations:
Colosseum Sensitivity Analysis