The Umbrella Sky Projects by Portuguese artist Patricia Cunha are examples of street art, an ephemeral art born in the sixties taking place in the urban landscape. A true open-air museum visible to all passers-by, street art allows artists to reappropriate places and communicate with residents. It encompasses and enhances various contemporary expressions such as graffiti, wall frescoes, displays, or even aerial installations such as the umbrellas of Castellar.