As it happens, this week the Berlin Wall has now been gone as long as it was up.
The wall existed from August 1961 to November 1989. More than 28 years and two months.
November 1989 till this week is 28 years two months.
I am surprised I didn’t see any news items about this.
Update February 13, 2018. This topic finally made the front page of the New York Times website.