Robert was elected bishop of Clermont in 1195. In 1197, he dedicated the
Abbey of Le Bouchet, founded by his father. Between 1197 and 1201 Robert was involved in a quarrel with his brother Guy in which both resorted to force. In 1197, Robert excommunicated his brother and placed his lands under interdict. He then ravaged his lands with hired soldiers for the next two years. At the same time, Robert got into a dispute with the troubadour
Pons de Capduelh over the castle of
Vertaizon, which Pons had received from his wife as a dowry some time before 1196 and which the bishop claimed as a fief. In 1199, Guy wrote to
Pope Innocent III requesting intervention. Before receiving a response, he engineered Robert's capture. Pons seized the bishop and imprisoned him in Vertaizon before handing him over to Guy. The bishop was accused of murder, arson and pillage. When Innocent learned of his imprisonment, he authorized the
archbishop of Bourges,
Henry de Sully, to absolve Guy on condition of penance for his own excesses. Henry reconciled the brothers in July 1199, and mediated a peace agreement signed in May 1201. As bishop, Robert sought to increase his hold on his castles and to expand his diocese's territory. In 1199, Count Guy did
homage to his brother for the castle of
Lezoux. In 1202, Guy committed the city of Clermont to the bishop's keeping until he had made peace with King Philip. Guy had sided with the English in the
Anglo-French War of 1202–1204. Robert thus became the first bishop to govern the city directly, a position subsequent bishops retained down to 1552. In 1205, Innocent III opened an inquiry into the dispute between Robert and Pons, which was still unresolved. At this, King Philip II intervened to force Pons' wife to turn the castle over to Robert. In 1211 Pons and his wife, with their three sons, three daughters and three sons-in-law, sold Vertaizon to the bishop for 7,650
marks, of which 7,000 were to be retained by the bishop as compensation for his unlawful imprisonment. In 1206, Robert and Guy again fell into dispute. In 1207, Guy again imprisoned his brother. Although excommunicated by the pope, he only released Robert after King Philip marched an army against him. He had to pay reparations and give security. In 1207, Robert acquired the fiefs of
Montmorin and
Mauzun from the king. A castle was begun at Mauzun imitating the royal style introduced into the Auvergne by Philip. Robert participated in the
Albigensian Crusade with his own troops. In July 1209, he and Guy were among the leaders of the army that marched out of Lyon. They had returned to the Auvergne before the end of the year. In 1211, according to the
Chronicle of
Bernard Ithier, a new dispute arose between Robert and Guy, during which the count destroyed the monastery of
Saint-Pierre de Mozac. A royal army under
Guy II of Dampierre and Archbishop Renaud of Lyon captured nearly all of Count Guy's possessions and confiscated his fiefs. This was the end of his disputes with his brother. In May 1212, a document issued by Robert indicates that Philip had given him the castle of Lezoux, the castle "between two rivers" (
inter duos rivos) and that of
Dallet. In 1215, Robert again joined the Albigensian Crusade, this time accompanied by
Géraud de Cros,
archbishop of Bourges. He returned to his diocese in 1216. In 1217, with Countess
Blanche of Champagne as his guarantor, he swore an oath of
fealty to the king. In 1217, as he was preparing to depart on the
Fifth Crusade, Duke Odo III of Burgundy placed his six-year-old son and heir, the future
Hugh IV, under the guardianship of Robert and
William of Joinville. When Odo died suddenly in 1218, Robert became the guardian of the young duke. In 1225, Robert attended the
Council of Bourges. During his long episcopate in Clermont, the
Franciscans set up in
Montferrand and the
Dominicans in Clermont itself (1219). He was succeeded at Clermont by his nephew,
Hugh, in April 1227. ==Archbishop of Lyon==