The Brill Building in New York City was a headquarters for many songwriters in the 1950s and 1960s. The building had offices for the writers, and also a small recording studio to make demo recordings. Don Kirshner hired the writers who worked there, and helped promote their works.
The Brill Building writers included many pop stars and future pop stars, including Jeff Barry, Neil Diamond, Carole King, Carole Bayer Sager, and Neil Sedaka. The Monkees recorded a large number of Brill Building songs, but they also wrote songs of their own.