As with the methods of preservation and rehabilitation, restoration allows modern modifications; however, the installment of these modifications must meet present safety and building codes. Once a southern plantation and home to President James Madison, Montpelier is an illustration of a building that went through one of the most extraordinary restoration processes of the twenty-first century. In the early nineteen hundreds, the house was bought by William DuPont adding rooms, bathrooms, and even changing the original roof of the house. Along with this DuPont also changed the historical grounds that surrounded the house landscaped during the time Madison resided. DuPont added additional buildings, horse stables, and horse track to the grounds.