This past week I was in Washington, DC, where we had lived for over 31 years. I visited friends, attended a lovely retirement party for my former boss, and drove through the old neighborhood. The one thing I did not do was go downtown to the National Gallery of Art (NGA), or more precisely, its East Building. Ever since that building was built in the 1970’s, whenever I was in DC on business or pleasure, I had to stand in the East Wing…