Facepalm

you read my mind, was just editing my previous comment when you sent this

the Roman legislation principles is the foundation for all modern counties with a court, parliament and executive power

The Roman consul and senate are nominatively similar to modern parliaments. But their functions were radically different. You don't have MPs and Senators obtaining their positions by leading armies of conquest abroad and bringing back slave captives to be tributed to the imperial core. You don't have civil wars to decide the next President or a pagan faith that places the nation's political leadership in the pantheon of occupied territories at sword point. You don't have a single city's local residents comprising the near-totality of the national body politic.

The American fumbling fathers event went so far as to copy many parts of it.

The iconography. Not the function. The actual political system was based on local colonial government organizations built on the back of the founding compacts of the first settlers. Local assemblies and mayoralities and governorships were features of European colonial rule, not Roman republicanism. State assembles and a national legislature/executives were features of Dutch protestant joint-stock company boards/executives not Roman dictatorships. Courts were based on the English Common-Law system not Roman Codes.

FFS, early American politicians knew jack shit about Roman civilization. They were working off of pseudohistory largely invented during the era of Charlemagne and passed telephone-style through editorialized written and oral histories for the next 1400 years. Thomas Jefferson and James Madison looked at the French Catholic aesthetic, which sought to invoke Roman art and architecture, and cribbed it to appeal to his snobby know-nothing American Protestant peers. Also, a ton of Freemason wink-wink shit. That's why they were putting pyramids and fasces on all their early works.

And much of the architecture was inspired or copied from Palladio. So toy get that neoclassical look that is the hallmark of DC

That's absolutely true. Although the real neoclassical look of DC wasn't really the focus of the city until the 19th century, because that shit was expensive to build and you needed Lincoln's greenbacks and the industrial revolution machinery to complete big iconic construction projects.

But it was all aesthetics, no substance. A bunch of ionic column toppers does not a Roman political system make.