Because of its manner of assembly and its role in the constitutional settlement after the departure of James II, the Parliament of 1689 is frequently called the Convention Parliament. It declared (contrary to fact) that James had abdicated, placed William and Mary on the throne, enacted the Bill of Rights, and thus established the ultimate supremacy of Parliament in the mixed and balanced government of England.
With equal or even more justice the Congress of 1789-91, the first under the new Constitution, can be called the Convention Congress. By its enactments and its precedents it gave living structure to the new system. It created the executive departments, organized the Supreme Court and inferior courts, chose a site for the national capital, resolved the old problems of debts and taxes, and wrote the first ten amendments to the Constitution. In these amendments it played the role of the second Convention that the Antifederalists had desired, but its manner of working was very different from that of the Convention of 1787.