what culture did the Founding Fathers of the U.S. constitution model it after?

The laws of the UK. But with some improvements. All currency for example should be in gold and silver to stop it being devalued. Whoops, it seems someone forgot that bit. China, has a trillion dollars in their reserves - they can buy a big chunk of the USA with that! You may have seen it before with Japan. There are some good Google videos on the subject.

The English, and specifically the Magna Carta was an important influence on the Constitution.

Romans--One main elected official and the Senate are both from Roman Republic

The Greeks and Romans, Where did you think democracy came from? The U.S did not invent that kind of government,

Look at the Dollar Bill.

Festooned with Masonic symbols.

It was primarily modeled after Enlightenment philosophers. There was some Iroquois influence.

Quit drinking that tea, religious freedom and no Queen Mother

Some say the Illuminati started a country here cuz over in Europe they were being hunted and persecuted and murdered. Don't know for sure..........

Chav culture, as demonstrated by 21st century UK.

Protestant England.