Be this as it may, the Virginia Assembly ceded to the federal government on December 3, 1789, a generous slice of Fairfax County to be incorporated with the State of Maryland's larger portion into a district for the federal capital, ten miles square. The Congress of the United States was pleased to accept this, and later an additional act of Congress of March 3, 1791, amended and repealed a part of the first act, naming Alexandria part of the ceded territory. And so for the next fifty-six years we have no longer Alexandria in Virginia, but Alexandria in the District of Columbia.

The Federal City (afterward Washington) which did not officially become the nation's capital until 1800, was an undrained marsh in 1790. Travelers visiting Alexandria about that time described it as having "upwards of three hundred houses," many "handsomely built."[49] In 1795 Thomas Twining passed through Alexandria and commented: "What struck me most was the vast number of houses which I saw building ... the hammer and the trowel were at work everywhere, a cheering sight."[50] The Duc de la Rochefoucauld in the following year stated: "Alexandria is beyond all comparison the handsomest town in Virginia and indeed is among the finest in the United States."[51] That same year, 1796, Isaac Weld remarked, "Alexandria is one of the neatest towns in the United States. The houses are mostly of brick."[52]

Virginians were largely their own architects. Thomas Jefferson designed Monticello, the University of Virginia, and the Capitol at Richmond; George Mason built Gunston Hall; and George Washington directed the transformation of Mount Vernon from a simple villa into the famous mansion it is. Alexandria "Undertakers," or contractors, did the work—James Patterson in 1758 and Going Lamphire from 1773 onward for a number of years. One Mr. Sanders, was called in about roof troubles and afterwards dismissed. John Carlyle was the great gentleman architect and builder of Alexandria. He built his own fine house, he took over Christ Church in 1773 when James Parsons failed to complete his contract, and he also superintended the erection of the Presbyterian meetinghouse.

James Wren, Gentleman, is remembered as the designer of Christ Church in 1767. Thomas Fleming is referred to as a ship's carpenter and "one who is inclined to serve the Town." A story goes that George Coryell built a gate in Philadelphia which so pleased the first President that he persuaded him to move to Alexandria. True or not, the local Gazette carried Coryell's advertisements of building materials and he is known to have built a number of houses. Robert Brockett was building in 1785 the Presbyterian Manse. Benjamin Hallowell, William Fowle, and William Yeaton at a later time proved themselves able architects.

The designs of Alexandria houses derived from the Old Country, and follow the type of eighteenth century architecture found in the British Isles, especially Scotland. The general floor plans of Alexandria's homes are similar. With the Builder's Companion and Workman's General Assistant, it was well-nigh impossible to go wrong. This series of pamphlets, reprinted in 1762 by William Pain of London, offered the purest and best of classical designs. The Scottish founders adapted them to their needs, with the result that Alexandria differs from other Colonial towns in Virginia, as Scotland differs from England. The spiritual and physical variations are keenly sensed.

The interior trim of Alexandria's houses is simple and severe compared to the plantation houses lining the Virginia rivers; to the elaborate carving of the fine eighteenth century Charleston homes it seems plain and austere. Nonetheless, there is a substantial dignity about these houses that produces an atmosphere of calm, gracious peace not unlike the interiors of meetinghouses. Even the little brick-and-frame cottages partake of this same feeling and are remarkable for the charm of their inviting and harmonious rooms. The simple overmantels, chair rails, wide and low six-paneled doors hung on the proverbial H&L hinges, well proportioned rooms and large, hospitable fireplaces, all done in miniature, form interiors rare in scale, surprising in elegance, perfect in balance.

For the better part of ten years after the Revolution, buildings continued going up as rapidly as bricks could be made and artisans found to put them together. As the town grew, the gaps along the streets were filled. Alexandria assumed the character, not of Williamsburg or Annapolis, but rather of Philadelphia or some Old World town. By 1795 it wore an air of stability as row after row of fine brick buildings went up. Alexandria houses were city dwellings and homes of merchants. Comfortable and inviting they were, too, with a wealth of detail in finish and appearance. Doorways and cornices for the outside; arches, mantels and paneling within. Very sad it is to relate how much of this has found its way into the museums of the country, and sadder still to tell how much has been wantonly destroyed. The New York Metropolitan Museum of Art houses one of the great rooms from Alexandria; the St. Louis Museum another; and some interior woodwork has found its way to Williamsburg.

Varied were the designs and never were the twain alike

Conceived and built as a trading center, by 1796, almost without exception, the first floor of every building was used as a place of business while the upper floors served as the family dwelling. This accounts for the more elaborate woodwork found on second floors. The Mutual Assurance Society archives reveal many instances of a store, countinghouse, office or shop located in a wing or attached building; likewise warehouses on the premises as well as along the water front.