The only two houses in the United States from the English colonial period (1607–1776) that can be definitively attributed to designs from "I quattro libri dell'architettura" are architect William Buckland's Hammond-Harwood House (1774) in Annapolis, Maryland and Thomas Jefferson's first Monticello. The design source for the Hammond-Harwood House is Villa Pisani, Montagnana (Book II, Chapter XIV), and for the first Monticello (1770) the design source is Villa Cornaro at Piombino Dese (Book II, Chapter XIV). Thomas Jefferson later covered this façade with additions so that the Hammond-Harwood House remains the only pure and pristine example of direct modeling in America today.