What happened April 1800 AD

Banneker kept a series of journals that contained his notebooks for astronomical observations, his diary and accounts of his dreams. The journals, only one of which escaped a fire on the day of his funeral, additionally contained a number of mathematical calculations and puzzles. The surviving journal described in April 1800 Banneker's recollections of the 1749, 1766 and 1783 emergencies of Brood X of the seventeen-year periodical cicada, Magicicada septendecim, and stated, "... they may be expected again in they year 1800 which is Seventeen Since their third appearance to me." The journal also recorded Banneker's observations on the hives and behavior of honey bees.

While one French army approached from the north, the Austrians were busy with another stationed in Genoa, which was besieged by a substantial force. The fierce resistance of this French army, under André Masséna, gave the northern force some time to carry out their operations with little interference.

The Library of Congress was subsequently established April 24, 1800 when President John Adams signed an act of Congress providing for the transfer of the seat of government from Philadelphia to the new capital city of Washington. Part of the legislation appropriated $5,000 "for the purchase of such books as may be necessary for the use of Congress ... and for fitting up a suitable apartment for containing them". Books were ordered from London, and the collection consisted of 740 books and three maps which were housed in the new United States Capitol.

The Library of Congress was established on 24 April 1800, when president John Adams signed an act of Congress providing for the transfer of the seat of government from Philadelphia to the new capital city of Washington.