There are a lot of monuments on the National Mall, so I'm assuming you mean the Washington Monument. It has gone through extensive repairs several times, and will be closed until 2019.
The Washington Monument will reopen in 2019 with an elevator.
Yes
it was under repair in early 2019 but is finished now
I was there 2 weeks ago (early Jun 2019) and the Washington Monument gift shop said the Monument was still closed with no estimated date when it will re-open.
Yes, and it's amazing
Construction will start in a few weeks new visitors center and elevator repairs also ground's work competition time with no major problems 2019.
No
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