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Castellorizon is the opening song on David Gilmour's third solo album, On an Island. It is an instrumental guitar solo, which starts off with a various sounds from other tracks of the album before the guitar is introduced. The song is based on a night Gilmour spent on the Greek island of Kastelorizo. It segues into "On an Island", the title track. The song received a nomination for Best Rock Instrumental Performance at the 49th Grammy Awards[1]. The song was nominated for the same Grammy Award again at the 51st Grammy Awards for a performance from Gilmour's Live in Gdańsk album[2].