Tin Pan Alley is the nickname given to one single block in Manhattan - 28th Street between 5th and 6th Avenues. This block became the epicenter of the music publishing and songwriting industries in the late 19th and early 20th centuries. This was where Irving Berlin, Cole Porter and the Gershwins created "popular music".
Some of the buildings these pioneers occupied still exist. These five row houses (47, 49, 51, 53 and 55 West 28th Streets) are now up for sale - for $44 million. Obviously, the original buildings would be torn down and another generic luxury condo building would be built on the site.
Go HERE for more information, and to sign a petition urging for the preservation of these historic buildings.