Did you know ...
... the Mercedes Benz 600 Pullman-Landaulet - this is the convertible version of the famous Mercedes Pullman - was based on a custom made Pullman exclusevely for Pope Paul VI. and was developed closely according his demands?

Not only the roof on the back could be removed but also the middle part of the coach and the last doors, the 'pope doors' became 25 cm longer by his demand. Also the whole roof part was liften by 7 cm.

So the very first Pullman-Landaulet had only 4 doors - and to my knowledge it is the only Pullman-Landaulet that exists having only four door without the middle part(of in total 57 built).
This very first exemplar of the Pullman-Landaulet was devliered on september 10. 1965 to the pope.

8 days later, on september 18. 1965, Elizabeth Alexandra Mary Windsor, Queen of England, landed on the airport of Köln/Bonn, visting Germany. She was taken by a second version of the Pullmann-Landaulet from the airport to the hotel, seems the developers of Mercedes Benz had built parallel without the 'pope stuff' so with a more regular cabin. You can see the shorter. regular back doors and the space between front and back doors, also regular baack seats:
So this was the first time the Mercedes Pullman-Landaulet was seen in public and many well known people phoned like Elvis Presley, Leonid Breschnew and Elizabeth Taylor the next day to order a Pullman-Landaulet too.
So many people today believe it was the German State first with Queen Elizabeth to be the first to be transported in this brand new car. This isn't entirely true. The first owner was Pope Paul VI. who even gave some ideas to build it.