STREET FESTIVAL ART INSTALLATION IN PORTO by likepublicart · 19/06/2015 Twitter Pinterest Facebook Google + STREET FESTIVAL ART INSTALLATION IN PORTO ‘s. joao structure’ is a cool street festival art installation with a reinterpretation of flying balloons and fireworks in the sky. ‘S. joao’ is one of europe’s liveliest street festivals, which is celebrated by the people of porto. No related posts.