Final answer:
The Constitutional Convention occurred in 1787, with George Washington presiding over the efforts that culminated in the creation of the United States Constitution.
Step-by-step explanation:
The Constitutional Convention took place in 1787. To be precise, the convention convened on May 25th, after enough delegates had arrived in Philadelphia, and it adjourned on September 17th of the same year. It was during this time that the United States Constitution was crafted.
George Washington presided over the convention, attending and leading the debates that would shape the nation's future. Initially, the purpose of the convention was to revise the Articles of Confederation, the first governing document of the United States of America which provided a loose federation of the states.
Through the contributions of prominent figures such as James Madison and Alexander Hamilton, the convention ultimately shifted away from amending the Articles. Instead, they aimed to create an entirely new framework for the federal government, resulting in the document we now revere as the oldest written constitution currently in use.