After some years of indefinitions, municipalities are now associated in metropolitan areas or intermunicipal communities. These new regional divisions are colliding with the traditional Portuguese regional structures: "Distritos" (Districts). Districts were implemented in the 19th century by Mouzinho da Silveira after the Liberal Revolution of 1820, to replace clerical dioceses (which held the intermediate authority between the absolute monarchy and the municipalities), and still are the official regional authorities in Portugal, thus leaving the new metropolitan authorities with no authority at all. For instance, the District of Lisbon and the District of Setubal collide and interfere with the Lisbon metropolitan area authority. Each District is ruled by a "governador civil" (civil governor). These governors are empowered by the Prime Minister of Portugal and have most of the administrative power over the municipalities comprised, leaving the metropolitan areas with a passive status and communitarian tasks.