The main library is housed in the Barbican Centre. Also provided are two smaller branches, children’s libraries and a home library service. The music library in the Barbican holds the largest collection of CDs in all London public libraries, together with books, scores and two pianos for public use. The Guildhall reference library holds a specialist collection on the history of London. The City Business Library supports business with free access to publications and databases, meetings, seminars and workshops on specialist topics.