Architectural Mash-up

I'm planning to create a 'mash-up' of different architectural styles for the diorama -

Giovanni Battista Piranesi and Terry Gilliam have an equal share of influence on the overall style and feel of Minions' environment -

Time Bandits 1981

This image The Professor's Dream (1848) by Charles Robert Cockerell is also particularly inspiring -

I'd like my diorama to be a microcosm of this idea with a selection of key architectural pieces representing different cultures.

Minions - FMP