The world's first inflatable concert hall was made of purple skin

In 2013, sculptor Anish Kapoor and architect Arata Isozaki collaborated to create Ark Nova, the world's first inflatable concert hall. The structure was designed as a mobile venue to bring music and performance to the regions of Japan that had been devastated by the 2011 earthquake and tsunami. When fully expanded, the hall resembled a giant, translucent purple bean that stood high enough to accommodate an audience of 500 people.