CS-53/56 Wojtek (Poland, Tier-8, MT, premium)
Historical Reference:
A project of the Military University of Technology in Warsaw in which the turret of a 56-ton tank was mounted on the chassis of the CS-53 medium tank. The vehicle turned out to be complex, low-tech, and expensive. As a result, the Polish military decided to focus on organizing large-scale production of the Soviet T-54, and the new heavy tank went no further than blueprints.
As i said, it is the 56TP if it were a medium
The Polish must have had lots of time back in the day, designing all those tanks nobody has ever seen or heard of.