Barcelona is a city that can’t be separated from its art–you might picture Gaudí architecture, Picasso paintings, or flamenco and jazz spilling onto the streets and into the night. But there’s another art scene that’s breaking into the mainstream from the margins–led by the city’s street vendors, known as manteros. Listen to how this group of people, often immigrants without legal protections or rights to work in Spain, fought to form a union to gain the voice they needed, and ended up creating a global and people-centered fashion-label that highlights human rights in the process.