the interaction between interiors and exteriors) and India, before arriving in Australia in 1957 where he stayed until 1966. All this contributed to Utzon's understanding of factors which contribute to successful architectural design. Architectural approach Utzon had a Nordic sense of concern for nature which, in his design, emphasized the synthesis of form, material and function for social values. His fascination with the architectural legacies of the ancient Mayas, the Islamic world, China, and Japan also informed his practice. This developed into what Utzon later referred to as Additive Architecture, comparing his approach to the growth patterns of nature. A design can grow like a tree, he explained: "If it grows naturally, the architecture will look after itself." Sydney Opera House In 1957, Utzon unexpectedly won the competition to design the Sydney Opera House. His submission was one of 233 designs from 32 countries, many of them from the most famous architects of the time. Although he had won six other architectural competitions previously, the Opera House was his first non-domestic project. One of the judges, Eero Saarinen, described it as "genius" and declared he could not endorse any other choice. The designs Utzon submitted were little more than preliminary drawings. Dr. Emory Kemp's consulting career began at Ove Arup, where, he conducted analytical calculations for the roof, noting this was no simple task, as Utzon’s sketches were designed to embellish the beauty of the international landmark, not necessarily for simple mathematics. Concerned that delays would lead to lack of public support, the Cahill government of New South Wales nonetheless gave the go-ahead for work to begin in 1958. The British engineering consultancy Ove Arup and Partners put out tenders without adequate working drawings and construction work began on 2 March 1959. As a result, the podium columns were not strong enough to support the roof and had to be rebuilt. The situation was complicated by Cahill's death in October 1959. The extraordinary structure of the shells themselves represented a puzzle for the engineers. This was not resolved until 1961, when Utzon himself finally came up with the solution. He replaced the original elliptical shells with a design based on complex sections of a sphere. Utzon says his design was inspired by the simple act of peeling an orange: the 14 shells of the building, if combined, would form a perfect sphere. Although Utzon had spectacular, innovative plans for the