Free Imperial Cities of the Holy Roman Empire (Top 20)
Guess the twenty most populous modern cities that were once free imperial (meaning somewhat autonomous) cities of the Holy Roman Empire.
Based on: https://en.wikipedia.org/wiki/List_of_free_imperial_cities. The quiz includes cities that were free imperial cities by 1792 as well as cities that were no longer free imperial cities by 1792.
The modern countries where these former free imperial cities are located are included in the first column. Each city's current population can be found in the second column.
Either type the modern name of the city or what it was named at the time (if it had a different name). Only the modern names are shown in the answers column.