A great many designs were submitted, but the one selected among the number was that of Mr. Robert Mills, a well known and eminent architect of the times.
This plan, as published to the country, was described in the following language:
Description of the Design of the Washington National Monument, to be erected at the seat of the General Government of the United States of America, in honor of "the Father of his Country," and the worthy compatriots of the Revolution.
This design embraces the idea of a grand circular colonnaded building, 250 feet in diameter and 100 feet high, from which springs a obelisk shaft 70 feet at the base and 500 feet high, making a total elevation of 600 feet.
This vast rotunda, forming the grand base of the Monument, is surrounded by 30 columns of massive proportions, being 12 feet in diameter and 45 feet high, elevated upon a lofty base or stylobate of 20 feet elevation and 300 feet square, surmounted by an entablature 20 feet high, and crowned by a massive balustrade 15 feet in height.
The terrace outside of the colonnade is 25 feet wide, and the pronaos or walk within the colonnade, including the column space, 25 feet. The walks enclosing the cella, or gallery within, are fretted with 30 massive antæ (pilasters) 10 feet wide, 45 feet high, and 7-1/2 feet projection, answering to the columns in front, surmounted by their appropriate architrave. The deep recesses formed by the projection of the antæ provide suitable niches for the reception of statues.
A tetrastyle portico (4 columns in front) in triple rows of the same proportions and order with the columns of the colonnade, distinguishes the entrance to the Monument, and serves as a pedestal for the triumphal car and statue of the illustrious Chief; the steps of this portico are flanked by massive blockings, surmounted by appropriate figures and trophies.
Over each column, in the great frieze of the entablatures around the entire building, are sculptured escutcheons (coats of arms of each State in the Union), surrounded by bronze civic wreaths, banded together by festoons of oak leaves, &c., all of which spring (each way) from the centre of the portico, where the coat of arms of the United States are emblazoned.
The statues surrounding the rotunda outside, under the colonnade, are all elevated upon pedestals, and will be those of the glorious signers of the Declaration of Independence.
Ascending the portico outside to the terrace level a lofty vomitoria (door way) 30 feet high leads into the cella (rotundo gallery) 50 feet wide, 500 feet in circumference and 60 feet high, with a colossal pillar in the centre 70 feet in diameter, around which the gallery sweeps. This pillar forms the foundation of the obelisk column above.