The festival was conceived by Peter Hurford to celebrate the building of the new organ in St Albans Cathedral by Harrison & Harrison. The main competitions are still conducted on this instrument, its eclectic style and modern electropneumatic action now complemented by another self-contained tracker action instrument which The International Organ Festival Society, the charity which runs the Festival, has had built for its own use and sited at St Saviour's Church, St Albans. This was built by Peter Collins in the style of, and in homage to, the early 18th century German organ builder Andreas Silbermann. There is a new (2005) organ in St Peter's Church, St Albans by Mander Organs, which has played a role in the festival and competitions since 2007. Recent competitions have also visited London, with competition rounds regularly held at Christ Church Spitalfields and, in 2017, a concerto final at St John's Smith Square.