 Their principality is sometimes called "Lo Stato Landi" ("the Landi state"); although the term is not well known, there is substantial documentation of it in the Archivio Segreto Vaticano, in the Vatican City.The Landi were a feudal family from the area of Piacenza; they may have originated in Bobbio.They are thought to have descended from one Rodolfo Landi; however, it has also been suggested that they were descendants of an ancestor named Lando or Orlando.