At the meetings of the Commission, which were infrequent and usually not attended by all three men, their primary concern was what kind of layout the new area of the city should have, a rectilinear grid such as was used in Philadelphia; New Orleans; Savannah, Georgia; and Charleston, South Carolina, or a more complex system utilizing circles, arcs or other patterns, such as the plan Pierre Charles L'Enfant had used in laying out Washington, D.C. In the end, the Commission decided on the gridiron as being the most practical and cost-effective, as "straight-sided and right-angled houses are the most cheap to build and the most convenient to live in."