Misc: approximately how old is the first known written advertisement?

Questions

On This Day In January 1990 - The Leaning ______ of Pisa was closed to the public. The accelerated rate of "leaning" raised fears for the safety of its visitors.?

On This Day In January 1996 - ______ Arzu was elected president of Guatemala.?

On This Day In January 1996 - One of the biggest ______ in U.S. history hit the eastern states. More than 100 deaths were later blamed on the severe weather.?

On This Day In January 1998 - Former White House intern Monica Lewinsky signed an affidavit denying that she had an affair with U.S. President______ .?

On This Day In January 1999 - U.S. President Clinton went on trial before the______ . It was only the second time in U.S. history that an impeached president had gone to trial. Clinton was later acquitted of perjury and obstruction of justice charges.?