Asolo is a town and comune in the Veneto Region of Northern Italy. It is known as "The Pearl of the province of Treviso", and also as "The City of a Hundred Horizons" for its mountain settings.

The town was originally a settlement of the Veneti, and was mentioned as Acelum in the works of Pliny. Its citizens were inscribed into the Roman tribe, Claudia. It was called Acelum in the acts of a synod held in Marano in 588 or 591, since one of the participants was Agnellus episcopus sanctae Acelinae ecclesiae; the name Asolo was already in use by the time of a synod held in Mantua in 827 (or perhaps 835), at which the participation of Arthemius episc. Asolensis is noted. In 969, Emperor Otto I assigned the territory of the diocese of Acelum/Asolo to the diocese of Treviso. This action may be related to the destruction caused by the Hungarian raiders who in 899 defeated Berengar I of Italy near the town. However, one of the bishops at a synod at Rome under Pope Leo IX in 1049 was called Ugo of Asolo. No longer a residential bishopric, Acelum is today listed by the Catholic Church as a titular see.

In the early Middle Ages Asolo was a possession of the Ezzelino family. Later, it was the capital, and seat of the court, of the fiefdom of Asolo, which was granted by the Republic of Venice (to which it belonged) to Caterina Cornaro, the former Queen of Cyprus; in 1489 it was granted to her for life, but in 1509 when the League of Cambrai conquered and ransacked Asolo, Caterina fled to exile and died in Venice a year later. Under her reign, the painter Gentile Bellini and the humanist Cardinal Pietro Bembo were part of the court.

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