William Penn certainly knew its address—his close friend and trusted confidant, Samuel Carpenter built The Tun and served as Penn’s Deputy Governor and the colony’s first Treasurer. Penn’s fondness for fine ale is well-documented.
The Continental Congress certainly knew the address. Many members often met there informally after sessions.
John Adams knew the address. As the head of the Naval Committee he and members of the Continental Congress used The Tun’s second floor meeting room to write the Articles of War that structured and organized what is now the U.S. Navy.
George Washington knew its address. After being chosen as the Commander of all American forces to fight the British, members of the Continental Congress held his celebratory dinner there.
Thomas Jefferson, Patrick Henry, Haym Salomon, and most of the supporters of the American Revolution knew its address. They were “regulars” when visiting Philadelphia.
And Benjamin Franklin certainly knew its address — he joined two of the organizations founded there, and later printed the “menus” for one of the other organizations who met there for fundraising dinners. That organization still has one of those original menus… and the receipt!
And if you wanted to volunteer as a Marine in 1775, you HAD to know The Tun’s address, as it was the sole recruiting location for Marines in the entire country! Tavern proprietor, Robert Mullan was a Freemason as was Samuel Nichols, the man charged by the Second Continental Congress with raising “two battalions of marines”, and together these two friends accomplished this at Mullan’s tavern (The Tun), likely because of its proximity to the Delaware River where the new ships of the Continental Navy were being finished.