In the millenary history of Venice a set of emergencies – environmental, military, sanitary – alternated with an endless activity of redesign and management of its territory. Looking back at this legacy means to engage with planning as well as with a restless legislative and judiciary activity that codified and supported both the implementation of massive projects as well as routine operations. With this history, the more contemporary efforts to safeguard Venice and its lagoon are a set of designs and techniques also made possible thanks to special legislation.