1 / 3   A guest leaves after posing into the Swedish sauna Solar Egg temporarily exhibited at the Swedish institute in Paris, France on Friday. /Chinanews Photo

2 / 3   The exhibition will discuss the future of urban planning and highlight Kiruna as an exciting example of social sustainability. Visitors will be able to see and experience a long-term commitment to the renewal of the city, in the symbol of the solar egg. /Chinanews Photo

3 / 3   The Solar Egg, a traditional sauna room created by artists Mats Bigert and Lars Bergstrom, was originally constructed in Kiruna in the Swedish Lapland, as a meeting place for residents who were displaced by mining. /Chinanews Photo