The International Festival of Organ and Chamber Music is an annual event that celebrates the beauty and power of organ and chamber music. Featuring performances from renowned organists and chamber ensembles from around the world, the festival is a celebration of the unique sounds and textures of these two distinct musical styles.
From Wikipedia
The International Organ Festival (IOF) is a biennial music festival and organ competition held in St Albans, England since 1963. Originally held annually, it was changed to every two years in 1965 due to the complexity of organising the increasingly ambitious programme. The festival is run mainly by volunteers.