a 3D stereoscopic viewing system with custom content, and custom-designed motion simulators with audio-visual content. The pavilion of Portugal hosted the Portuguese national representation during the event. It was designed by Álvaro Siza Vieira. The entrance to the building was covered by a large concrete veil, mimicking a paper sheet linking two main buildings and opening a wide urban space. The total number of visitors of the Expo '98 reached 10,128,204, for a duration of 132 days. Admission prices (adult) were 5,000 escudos PTE (US$34 at then-exchange rates) for one day, 12,500 escudos ($84) for three non-consecutive days and 50,000 escudos ($334) for three months. The Oceans Pavilion, built to be the Lisbon Oceanarium after the Expo closed, had the longest lines. Other popular pavilions, with lines of up to five hours on busier days, included Portugal, Spain, Sweden, Germany, and Virtual Reality. Logo, Mascot and Music The Expo logo symbolizes the Sea and the Sun. It was conceived by Portuguese Augusto Tavares Dias, creative director in an advertising agency, and selected from 1,288 entries. The Expo mascot was conceived by the Portuguese duo of painter António Modesto and sculptor Artur Moreira. It was selected from 309 entries. It is named Gil, after Portuguese navigator Gil Eanes. The name was chosen by high-school student José Luís Coelho, from 765 entries. Gil turned the RTP mascot and can be see on the station main events. The official music theme for the Expo 98 was called "Pangaea" and was written by Nuno Rebelo. It combined chants and instruments from the five continents over an epic full orchestral score. After Expo '98 closed on 30 September 1998. The last day saw more than 300 thousand visitors enter, there to see the closing fireworks show, the largest ever presented in Portugal. The site remained closed until February 1999, when it reopened as Parque das Nações (Park of the Nations), a free-access park, keeping the gardens, Oceanarium (Europe's then-largest aquarium), observation tower, funicular, and the Virtual Reality pavilion. Other buildings were re-purposed for the opening, including: the main entrance (sun door), converted to Centro Vasco da Gama, a regional shopping mall (opened on 27 April 1999) the main exhibition pavilions, converted to Feira Internacional de Lisboa (Lisbon International Exhibition Fair) Utopia Pavilion, converted to Pavilhão Atlântico (now Altice Arena, after the naming rights were sold to a sponsor), Lisbon's main multi-purpose indoor arena Knowledge of