The villages of Sulla and Arischion were located on the left bank of the Rio Mannu (fig. 1); they were probably abandoned at the same time as, from the second half of the fifteenth and early sixteenth centuries, the old village of Posada moved under the Castello della Fava, in order to escape the dangers of Saracen invasions. The inhabitants of the two small towns would also have moved to the new settlement.

Documents dating from the fourteenth century place Sulla to the north of Posada, near the modern town of Sas Murtas, where findings of archaeological material have also been documented. The village of Arischion was closely linked to that of Sulla and located next to the latter (figs. 2-3). It probably stood near the current location of San Paolo, as the parish church of Arischion, of which no trace is left, was dedicated to this saint. Moreover, archaeological material has been found throughout this area, which could indicate the presence of a settlement.

Fig. 1 - Place names of the parish of Posada recorded in Liber fondachi (from PANEDDA 1978, p. 555).

Fig. 2 - Probable location of the ancient village of Arischion (from Google Earth, re-elaboration by E. Dirminti).

Fig. 3 - Territory to the north-west of the Castello della Fava, where the Arischion village probably stood (photo by E. Dirminti).