20 facts about pianos and Boston

On the occasion of the massive public piano installation, a look at some key numbers.

The hands of pianists Yaltah Menuhin (1921 - 2001) and her husband Joel Ryce (1933 - 1998) playing a work for four hands, 18th October 1962. (Photo by Erich Auerbach/Hulton Archive/Getty Images)
Erich Auerbach/Hulton Archive/Getty Images

Seventy-five pianos-turned-artistic-canvases will be installed in the Boston area this week to commemorate Celebrity Series of Boston’s 75th season. More details.