[2] It took six years from the initial idea for a major new piece of public art to the unveiling of Sky Mirror on 27 April 2001, and cost £921,000 (equivalent to £1,924,000 in 2023).
[5] From 28 September 2010, Sky Mirror and three other Kapoor sculptures were exhibited in Kensington Gardens, London.
The location of Sky Mirror was previously occupied by a sculpture by Henry Moore – a work that was donated by the artist, but had been removed for conservation in 1996.
[8] Kapoor's sculptures were guarded round-the-clock at a cost estimated to be £120,000 paid for by the Royal Parks Agency.
[9] From 20 September to 27 October 2006, a larger version of Sky Mirror was installed at Rockefeller Center in New York City.