The CDP theme day for April 1, 2022, is Symmetry. We may think of something with two imirror-image halves. But symmetry can be more complex, anything from a Star of David to the dome of the Florence Duomo to ways of writing a musical fugue. What is reflected upon itself in your city? This is a photo of a box of tissues on my desk that I suppose I took one day when I was bored at work. The Linky is open from March 28 to April 3, 2022.