math_fact: 1787 is the number of different arrangements (up to rotation and reflection) of 12 non-attacking queens on a 12×12 chessboard.
trivia: 1787 is an unremarkable number.
historical_date: November 21st is the day in 1990 that the Charter of Paris for a New Europe refocuses the efforts of the Conference for Security and Co-operation in Europeon post-Cold War issues.