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  The town of Ariccia's area covers mostly that of the ancient Ariccia on the 
                  hill towering ‘Vallericcia', a flat land once occupied 
                  by a great volcanic crater, and that of the centre built by 
                  Romans along the ancient Via Appia's path. Ariccia was member 
                  of the Latin League and in its territory was defeated the Etruscan 
                  army commanded by Porsenna. The Diana's temple on the Nemi's 
                  lake shore, the ‘Speculum Dianae', also was part of its 
                  territory. 
After participating in the struggle between Latins and Romans, 
                  it was conquered by the Romans and became a Municipium; Via 
                  Appia's opening and the increasing commercial traffic 
                  determined Ariccia's development, that became the first 
                  stage-coach station along this important artery.  
                It was devastated by Mario in 87 A.C., but it flourished again 
                  and rapidly; during the imperial Age it was enriched by temples, 
                  baths, and important public offices. The Barbaric invasions 
                  determined its inexorable decline that reached its peak in 827 
                  with the Saracens' destruction. The survivors built a 
                  new centre in the acropolis. A ‘Castrum Ariciensis' 
                  is first mentioned in some documents of the year 990, when Ariccia 
                  was property of the Conti di Tuscolo. In the 11th century Ariccia 
                  belonged to the Holy see until the 1437, when the Savelli became 
                  their owner. This Family drained the lake and built a castle. 
                  In 1661 Ariccia was sold to the Chigi, a Sienese Family that 
                  contributed to transform the plan of Ariccia according to the 
                  Bernini's designs. 
                Pius VI (1775-1799) ordered the Via Appia's reopening 
                  and Ariccia gained again the importance it had in the past, 
                  improved by the building of a grand viaduct with three orders 
                  of arches. After its fall, the viaduct was rebuilt in 1947 and 
                  it is still towering over the Chigi's park. 
                The ruins of the ancient Ariccia are not numerous and they 
                  are located mostly in private agricultural grounds. Among these: 
                  the ‘Basto del Diavolo', an arch made of peperino blocks, 
                  below the street's level, that was one of the town's gate; and 
                  a two-hundred-meter-long and ten-meter-high substructure, which 
                  once had an important function: thanks to it the path of the 
                  Via Appia could overcome the difference in height between the 
                  hills. 
                 
 
 
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