This is the place we call the old Pennsylvania State House in Philadelphia.
The continental constitution was held here from May 25th to September 17th, 1787
There were 4 main leading delegates George Washington, James Madison, Benjamin Franklin, and Alexander Hamilton plus a bunch of other delegates.
Than there was conflict that the small states wanted each state to have the same number of representatives in congress. The big states wanted representation based on population. Slavery was another conflict too.
So we all solved that conflict by good portion of work time at the Constitutional Convention involved proposal, debate, and finally, agreement upon a number of compromises as many of the Framers had specific ideas about which policies and procedures could benefit government at a national level.