Monulph was a sixth-century bishop of Tongeren-Maastricht. A shadowy figure, his date of death is traditionally given as 588. ALegend holds that he founded a church in 558 at the river confluence that would become Liège

Liège

Liège is a major city and municipality of Belgium located in the province of Liège, of which it is the economic capital, in Wallonia, the French-speaking region of Belgium....

. His birthplace is given as Dinant

Dinant

Dinant is a Walloon city and municipality located on the River Meuse in the Belgian province of Namur, Belgium. The Dinant municipality includes the old communes of Anseremme, Bouvignes-sur-Meuse, Dréhance, Falmagne, Falmignoul, Foy-Notre-Dame, Furfooz, Lisogne, Sorinnes, and Thynes.-Origins to...

, his father's name as Randace.

He is also supposed to have moved the see

Episcopal See

An episcopal see is, in the original sense, the official seat of a bishop. This seat, which is also referred to as the bishop's cathedra, is placed in the bishop's principal church, which is therefore called the bishop's cathedral...

 of the diocese, from Tongeren to Maastricht

Maastricht

Maastricht is situated on both sides of the Meuse river in the south-eastern part of the Netherlands, on the Belgian border and near the German border...

. In practice the bishops had resided there from the beginning of the sixth century. Monulph built a large tomb for St Servaas., or "Aravatius".

His successor was Gondulphus

Gondulphus of Tongeren

Saint Gondulphus of Maastricht was the Bishop of Tongeren and Bishop of Maastricht in the sixth century....

; they are both Catholic saints, sharing the feast day July 16. The Catholic Encyclopedia

Catholic Encyclopedia

The Catholic Encyclopedia, also referred to as the Old Catholic Encyclopedia and the Original Catholic Encyclopedia, is an English-language encyclopedia published in the United States. The first volume appeared in March 1907 and the last three volumes appeared in 1912, followed by a master index...

of 1913 raised the question of whether they may refer to the same person. Louis Duchesne

Louis Duchesne

Louis Marie Olivier Duchesne was a French priest, philologist, teacher and a critical historian of Christianity and Roman Catholic liturgy and institutions....

 has suggested that Monulph succeeded Servaas directly (in contradiction of the account in Gregory of Tours

Gregory of Tours

Saint Gregory of Tours was a Gallo-Roman historian and Bishop of Tours, which made him a leading prelate of Gaul. He was born Georgius Florentius, later adding the name Gregorius in honour of his maternal great-grandfather...

).