(Video link) Antonín Langweil began as a painter of miniature portraits. Then, starting in 1826, he began his big project: a detailed model of the city of Prague.
He measured each building and then drew the elevations on stiff paper.
Then the paper could be folded and attached together. This is a good way to make reference maquettes, too.
Langweil's Prague is scaled at 1:480, and includes not only an accurate portrait of each building, but also tiny details such as signs and sundials.
The model is a valuable document for historians of the city because it shows how things looked before 20th century modernization efforts.