Saint Roseline otherwise Roseline or Rossolina de Villeneuve (1263–January 17, 1329) is a French Roman Catholic saint.
Roseline was born at the château of Les Arcs-sur-Argens, Var, in eastern Provence, near Draguignan. Having overcome her father's opposition, Roseline became a Carthusian nun at Bertaud in the Alps of Dauphiné. Her "consecration" took place in 1288, and in about 1330 she succeeded her aunt, Blessed Jeanne (Diane) de Villeneuve, as Prioress of La Celle-Robaud in the Diocese of Fréjus near her home. In 1320 her brother Hélion de Villeneuve, Grand Master (1319–46) of the Knights of St. John, restored the monastery, and in 1323 and 1328 Pope John XXII, formerly Bishop of Fréjus, increased its revenue, granting indulgences for the anniversary of the dedication of the church.
Roseline obtained leave to resign her office before her death. Many visions together with extraordinary austerities and great power over demons are ascribed to her.
The feast of Saint Roseline is on 17 January. Her feast is given in the Acta Sanctorum on 11 June, the day of the first translation of her remains in 1334 by her brother Elzéar, Bishop of Digne; but by the Carthusian Order it is celebrated on 16 October.
There has always been a local cultus and this was confirmed for the Diocese of Fréjus by a Decree of 1851, for the Carthusian Order in 1857. The saint is usually represented with a reliquary containing two eyes, recalling the fact that her eyes were removed and preserved apart. This relic was still extant at Arcs in 1882. There is no ancient life of the saint, but that given in the Acta Sanctorum, 2 June, 489 sq., was constructed by Papebroch from ancient documents.