This is the original template to help you design a map with these odd buildings. There are five sets of trade workshop: Gaia, Asian, Babylonian, Egyptian and Greek.
Rating: 2.5
Nothing wrong with the template other than its purpose is now replaced by modern tools such as the composite editor. Plus the trade workshop template has cropped up multiple times.
Additional Comments:
The majority of existing templates seem to be for one map size rather than covering all sizes.