L'Enfant identified himself as "Peter Charles L'Enfant" during most of his life, while residing in the United States. He wrote this name on his "Plan of the city intended for the permanent seat of the government of t(he) United States ...." (Washington, D.C.) and on other legal documents. However, during the early 1900s, a French ambassador to the United States, Jean Jules Jusserand, popularized the use of L'Enfant's birth name, "Pierre Charles L'Enfant". (Reference: Bowling, Kenneth R. (2002). Peter Charles L'Enfant: Vision, Honor, and Male Friendship in the Early American Republic. George Washington University, Washington, D.C. ISBN978-0-9727611-0-9). The United States Code states in 40 U.S.C. 3309: "(a) In General. —The purposes of this chapter shall be carried out in the District of Columbia as nearly as may be practicable in harmony with the plan of Peter Charles L'Enfant." The National Park Service identifies L'Enfant as Major Peter Charles L'Enfant and as Major Pierre (Peter) Charles L'Enfant on its website.