The Busan Opera sits precisely at the centre of the Old Harbor and is a unique opportunity to construct a platform dedicated to the city’s urban life and the expression of its public. In our proposal we aimed to retrieve consistency between the iconographic and the functional by reducing the poche space by adopting a structural solution for the roofs that will be at once functional and expressive. Opera venues have to span large voids in order to host very large audiences. This is usually done by sheer structural depth, but in this case our proposal is to use bidirectional catenary structures that will be able to bridge between the walls than contain the venues with a minimum amount of material working in tension. This roofing technology is one that has been used often in large scale temporary structures, such as circus tents and marquees, but it is also a technology that has developed its own lineage within the history of modern architecture: Saarinen’s Yale Ice Rink and Dulles Airport, Tange’s Yoyogi Stadium, Siza’s Pavillion are all precedents of this strategy.