The Constitutional Convention was held in Philadelphia in 1787 with 55 delegates representing 12 states debating how to reform the weak national government under the Articles of Confederation. They proposed two plans - the Virginia Plan which favored a strong national government and proportional representation, and the New Jersey Plan which favored equal representation among states. The delegates ultimately agreed to the Connecticut Compromise (Great Compromise) which created a bicameral Congress with proportional representation in the House and equal representation among states in the Senate. The convention also established the three branches of government and a system of checks and balances between them. Slavery was also a major point of contention that was addressed through compromises.