The introduction date of the very first commercial double decker bus (just like the first bus itself) seems to be open to some debate, as different versions of models and claims appear all over the internet. Generally what is agreed upon is that commercial buses were first widely introduced in the 1820′s, (with a few previous unsuccessful attempts briefly recorded in France as early as 1662) and as this is some time before the introduction of the combustion engine, they were horse drawn as you would expect.

Used resourses

https/en.wikipedia

Картинки в google