Havana sidewalk transforms into art gallery for XIII Biennal More than a kilometer of a coastal sidewalk in Havana is turned into an art gallery as part of the city's XIII Biennal arts event, which is expected to bring together some 500 Cuban artists and 300 more from around the world. The project named 'Behind the Wall,' comprising works of more than 60 artists, is one exhibit in the month-long event.