The Ager Romanus, as a political zone subject to the municipium of Rome, theoretically continued to extend "ad centesimum lapidem", but in practice many of its regions ended up in Lombard hands, with still others managed by the religious authorities or the pope, who were beginning to manage their territories by means of "patrimonia" and "domuscultae". The "motu proprio" of 6 July 1817 by Pope Pius VII established the boundaries of the municipium of Rome, assigning to the capital its present communal territory as well as the present communes of Fiumicino, Pomezia and Ardea. The confines of the Comunità di Roma were thus finally defined and no longer nebulous, and these limits ended at the constitution of the commune of Pomezia (also including present-day Ardea) following its lasting foundation during the "bonifica fascista" and—in the 1990s—of Fiumicino.