The total number of pianos built by Cristofori is unknown.
One of the first grand pianos built by Bösendorfer signed Ig.
One of the finest pieces in the museum is a square piano built in 1825 by William Geib.
The first piano built here, No. 483, was displayed at the Metropolitan Museum of Art for 11 years, until last May.
Ms. Zhang began her training at 4 on a piano built by her father, who made violins and guitars.
As a child, Zhang began to learn music with her mother on a piano built by her father.
The sustaining, or damper stop, was first controlled by the hand, and was included on some of the earliest pianos ever built.
There are quiet études for acoustic piano, built around small clusters of notes that never quite congeal into chords.
This concert was in celebration of the 500,000th piano built at Carnegie Hall.
"I had lots of ideas, so I had a piano built right over my bed," he said.