The traditionally Roman process that employed the army, existed with precedence and the Romans made solely their appropriateness, turnning in territorial ranking shafts. The causeways construction results to then indispensable to add the conquered territories and to make them accessible to the army. It exists two very principals ways : 1th) `De Italy in Hispanias', between Milan (Mediolanum) and León (Legio VII Germina); and 2th) `Ab Asturica Terracone' in opposite sense.
     Osca exercised a fundamental paper in the communication with the Empire, through the Pyrenees. From the city of the Segre born branches toward Osca and Celsa and after with Augusto, the way Ilerda - Osca -Cesaraugusta by the decadence of the colony of Celsa. But after 218 before Christ was worked the causeways, existing documentation of the construction of a that was following the shaft of the Cinca river (118-110 before Christ.). Were existing other itineraries, of second and third order, that taking advantage the ancient roads tracing of the indigenous. Osca was provided of next accessions of agrarian production (villae). Some that they have been discovered, they are next to the city, as that of `La Magantiná ( nº 6 Industrial Polygon ) together to the Isuela river and to 4 Km. of Apiés; that of Alerre (it has thermal baths remains); Ortilla (with many coins); Quinzano, Estrecho Quinto, Quicena, Pompién, Novales and Sangarrén.
     They existed some information offices to the traveler in the important cities, in those which was collected the experiences of others that they might have made the tour with precedence; this generated the famous written Itineraries, that they have been preserved. But, the principal process were employed, mostly, by the army, measuring the distances in `millia passum' (thounsand steps) and intercalating rest areas (mansions or 'mutationes'). It is known the route Ilerda - Osca - Cesaraugusta, that from Lérida coincides quite with the national highway. Near Almacellas, it takes address to Esplús, penetrating in Aragon by Valbona; after crossing the highway Binéfar-Ripoll (about Monzón), it is arrived to the Cerro de la Alegría, in which is found the mansion of Tolous; from there was departing other traced to Pompaleón.
     They are found remains milliarios or stone-paved in: Valcarca, Selgua, Berbegal, Laperdiguera and Pertusa until arriving to Bellestar. For each bridges, are crossed, Flumen and Isuela rivers to enter Osca by the Lanuza or San Lorenzo streets (according to other hypothesis). What is certain is that both streets form right angle with vertex in San Pedro Cathedral.
     The section until Cesaraugusta is worse preserved since coincides with the national highway. There are any mansions: `Bourtiná (Almudévar) and `Gallicum, (between Zuera and San Mateo de Gállego). Here was coinciding furthermore the route from Cesaraugusta to the Pyrene. The toponymy of Hospital of the Violated (Via Lata) can have relationship to some construction in this route. Next to Osca, they abound the numeral toponymy cited in so many occasions: Tierz, Cuarte, Siétamo, Estrecho Quinto, Nueno, etc.,

* Manuel Tomé Bosqued.

Upper Aragon, Literary Articles (Huesca, Spain)