The first Masonic Grand Lodge in the future United States is constituted in Massachusetts.

A Masonic Grand Lodge is the governing body or highest authority within Freemasonry, overseeing the operations of individual lodges within a specific jurisdiction.

Structure and Function:
The Grand Lodge sets the rules, regulations, and rituals that subordinate lodges within its jurisdiction must follow. It acts as the central administrative and authoritative body for Freemasonry in its region.
It charters new lodges, ensuring they operate under the principles and practices of Freemasonry.
It has the power to discipline lodges or individual members that violate Masonic laws or ethics.

Leadership:
The Grand Lodge is typically led by a Grand Master, who is elected by the members. The Grand Master is supported by other officers, such as Deputy Grand Master, Senior and Junior Grand Wardens, Grand Secretary, and Grand Treasurer.

Jurisdiction:
A Grand Lodge’s jurisdiction is usually geographically defined. For example, there may be one Grand Lodge for each state in the United States, one for each country, or even regions within a country.
Each Grand Lodge operates independently of others, though they often recognize and cooperate with each other.

Activities:
The Grand Lodge organizes annual meetings or communications, where representatives from all lodges within the jurisdiction gather to discuss and vote on important matters.
It promotes Masonic education, charity, and community service, often through various programs and initiatives.