Feb. 25 (UPI) -- On this date in history:

In 1791, the First Bank of the U.S. at Philadelphia became the first national bank chartered by Congress.

In 1836, Samuel Colt patented a "revolving gun," the first of the six-shooters.

In 1870, Hiram Rhodes Revels, a Republican from Natchez, Miss., was sworn into the U.S. Senate, becoming the first Black American to sit in Congress.

File Photo by Library of Congress/UPI