In 1806 a Commission is appointed to lay out new streets on Manhattan Island. The plan published in 1811 is the precursor to all subsequent events which will give form to the modern city. The gridiron extends north from the limits of the existing settlement and is defined by 12 north-south running avenues and 155 east-west oriented streets. The geometry of the blocks thereby defined anticipates their subdivision into lots 100 feet deep and with 25 feet of frontage. The natural landscape of Manhattan is sliced into seemingly endless orthogonal modules of real estate.