colonnades, facing south down the Lawn is the Rotunda, a one-half scale copy of the Pantheon in brick with white columns, that originally held the university's library. There are a total of 206 columns surrounding the Lawn: 16 on The Rotunda, 38 on the Pavilions, 152 on the walkways. The columns are of varying orders according to the formality and usage of the space, with Corinthian columns on the exterior of the Rotunda giving way to Doric, Ionic, and Composite orders inside; Doric, Ionic, or Corinthian on each of the pavilions; and a relatively humble Tuscan colonnade along the Lawn walkways. History Jefferson's design Jefferson's design for the Lawn sought to find an alternative to traditional single-building college architecture, such as that he experienced as a student at the College of William and Mary, due to its being "noisy, unhealthy, vulnerable to fires, and affording little privacy." The overall model for the Lawn (the U-shaped plan with a central dome) is similar to, and may have been influenced by, Joseph Jacques Ramée's design for Union College and Benjamin Latrobe's design for a military academy, as well as by the designs of Palladio and by his own house, Monticello. Along the legs of the U, the colonnades provide sheltered, but outdoor, communication between the pavilions and the student rooms, and while everything in the Lawn communicates with the Lawn or the outside world, there is privacy afforded by the walled gardens. Jefferson separated the buildings of the lawn into 10 units, or Pavilions, to reflect his classification of the branches of learning, and designed the relationship between them and the rest of the Lawn. Each of the ten Pavilions has a unique design, intended to give individual dignity to each branch of study, and the whole was intended to serve as a sort of outdoor classroom for architectural study, as he wrote to William Thornton, architect of the United States Capitol: Thornton obliged with designs for two pavilions, one of which was adapted for the design of Pavilion VII, the first to be built. Jefferson also solicited designs from Benjamin Latrobe, who had worked with Jefferson on the chambers for the United States House of Representatives. Latrobe responded with a sketch showing the plan of the university, with a domed structure resembling Palladio's Villa Capra "La Rotonda", and sent a second large drawing in October 1817 showing at least five Pavilion