Tanker's Tuesday: Vickers Independent Heavy Tank

The Independent A1E1 is a multi-turreted tank that was designed
by the British armaments manufacturer Vickers between the First
and Second World Wars. Although it only ever reached the prototype
stage it influenced many other tank designs.

The A1E1 design can be seen as a possible influence on the Soviet T-100
and T-28 tanks, the German Neubaufahrzeug tanks, and the British Medium
Mk III and Cruiser Mk I (triple turret) tank designs. The Soviet T-35 tank
was based extremely closely on its plans and layout.
http://arcaneafvs.com/a1.html