During the burning of Washington in the War of 1812, when a British expeditionary force leveled a cannon at the Patent Office, superintendent William Thornton “put himself before the gun, and in a frenzy of excitement exclaimed: ‘Are you Englishmen or only Goths and Vandals? This is the Patent Office, a depository of the ingenuity of the American nation, in which the whole civilized world is interested. Would you destroy it? If so, fire away, and let the charge pass through my body.'”

“The effect is said to have been magical upon the soldiers, and to have saved the Patent Office from destruction. … When the smoke cleared from the dreadful attack, the Patent Office was the only Government building … left untouched.”

(From R. Beresford’s Brief History of the United States Patent Office From Its Foundation, 1886.)