Italian Democratic Party of Monarchist Unity Tags: Political Party.Since 1961 the Italian Democratic Party of Monarchist Unity (Partito Democratico Italiano di Unità Monarchica PDIUM) was the continuation of the Italian Democratic Party (Partito Democratico Italiano) as they continued to call the PDIUM. extinction date 1972-07-11 extinction year 1972-01-01T00:00:00+02:00 formation date 1959-04-11 formation year 1959-01-01T00:00:00+02:00 ideology Liberal conservatism, Monarchism, Populism merged into party Italian Social Movement Learn more... Loading...