1998. He was involved in redesigning the Opera House, and in particular, the Reception Hall, beginning in 1999. In 2003, he was awarded an honorary doctorate by the University of Sydney; his son accepted the award on his behalf. In 2003, he received the Pritzker Prize, architecture's highest honor. In March 2006, Queen Elizabeth II opened the western colonnade addition to the building designed by Utzon who had not returned to Australia since 1966. His son, Jan, took his place at the opening ceremony instead, saying his father was "too old by now to take the long flight to Australia. But he lives and breathes the Opera House, and as its creator he just has to close his eyes to see it." On 28 June 2007, the Sydney Opera House was declared a World Heritage Site. Following Utzon's death in 2008, on 25 March 2009, a state memorial and reconciliation concert was held in the Concert Hall at Sydney Opera House. List of honours 1967 C. F. Hansen Medal 1973 RAIA Gold Medal from the Royal Australian Institute of Architects 1978 RIBA Royal Gold Medal 1980 The Daylight and Building Component Award 1982 Alvar Aalto Medal 1987 Nykredit Architecture Prize 1992 Wolf Prize 1998 Sonning Prize 2000 Golden Lion for Lifetime Achievement 2003 Pritzker Prize Influence According to Kenneth Frampton, Utzon's architectural influence is manifest on three levels: the emphasis given to the roof element, the importance given to the grounding of the building, and the commitment to "the cultural validity of organic growth".<ref>Frampton, Kenneth: "Between Artifice and Nature" in Louisiana Revy Vol.44 No.2 Jørn Utzon: The Architects Universe", Louisiana Museum of Art, 2004</ref> Kim Dirkinck-Holmfeld, writing in Dansk Arkitektur: 1960–1995, comments: Utzon did not obtain many commissions in his mother country but his importance was considerable in terms of direct imitation or inspiration. And he was the only Danish architect who made a significant contribution to the global development of Modernism. See also Architecture of Denmark References Further reading Françoise Fromonot: Jørn Utzon, The Sydney Opera House. Corte Madera, California: Gingko Press, 1998. Richard Weston: Utzon — Inspiration, Vision, Architecture. Denmark: Edition Bløndal, 2002. J.J. Ferrer Forés: Jørn Utzon. Obras y Proyectos. Works and Projects. Spain: GG 2006. Katarina Stübe and Jan Utzon, Sydney Opera House: A Tribute to Jørn Utzon. Reveal Books, 2009. External links Interview with Jørn Utzon, October 1992 Utzon Center Pritzker Architecture Prize 2003, including