What document guaranteed a representative assembly elected by landowners in Pennsylvania?

The Frame of Government, established in Pennsylvania by William Penn in 1682, laid out the principles for governance in the colony and specifically included provisions for a representative assembly. It granted the right to vote to landowners, thereby ensuring that the assembly was elected by those with property, which was in line with the colonial practice of political participation being tied to land ownership. This document emphasized democratic ideals for its time, allowing for local governance and a legislative body that represented the interests of a segment of the population.

The Charter of Liberties, while also significant, was primarily a later document that reaffirmed certain rights and laws within Pennsylvania, and it stemmed from the Frame of Government. The Articles of Confederation focused on the relationship between the states and the federal government after independence, establishing a different type of governance that did not pertain to colonial assemblies. The Constitution of 1789 established the current federal government framework and also does not relate to Pennsylvania's early governing structures. Therefore, the Frame of Government is the document that specifically guaranteed an elected representative assembly for landowners in Pennsylvania.