I am curious if you know facts or have heard myths about the pianos owned by great musicians of the past.
I can provide three famous examples to get things started:
Beethoven is said to have loved his Broadwood piano. Little is said, though, about what size this piano was. Was his piano veneered? I believe veneer and making pianos black is a later invention, intended to cover the many sins of the wood used in the rim.
Liszt absolutely loved his Steingraeber piano, which is a model about 200 centimiters long, 85 keys, I believe. (personally, I really like this business of having the piano start and finish in the same note. Stuart & Sons are like that now; nine full octaves, I believe)
Leopold Godowsky, my hero, owned a Knabe. I am not sure of the size, but I will try to find out and let you guys know.
Any others? Brahms, Schumann, Chopin, Rachmaninoff, Ravel, Debussy, Bartok?