William de Landallis was a 14th century Bishop of St. Andrews. Like his predecessor, James Bane

James Bane

James Bane was Bishop of St. Andrews for a brief period in the early 14th century. In his earlier career, James had been a canon of Aberdeen and prebendary of Cruden....

, he was a native of Aberdeenshire

Aberdeenshire

Aberdeenshire is one of the 32 unitary council areas in Scotland and a lieutenancy area.The present day Aberdeenshire council area does not include the City of Aberdeen, now a separate council area, from which its name derives. Together, the modern council area and the city formed historic...

, serving as rector of Kinkell before being appointed by Pope Benedict XII

Pope Benedict XII

Pope Benedict XII , born Jacques Fournier, the third of the Avignon Popes, was Pope from 1334 to 1342.-Early life:...

 as the successor of James at St. Andrews. The prior

Prior

Prior is an ecclesiastical title, derived from the Latin adjective for 'earlier, first', with several notable uses.-Monastic superiors:A Prior is a monastic superior, usually lower in rank than an Abbot. In the Rule of St...

 and the chapter

Chapter (religion)

Chapter designates certain corporate ecclesiastical bodies in the Roman Catholic, Anglican and Nordic Lutheran churches....

 of 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...

 had actually chosen a man called William Bell, dean

Dean (religion)

A dean, in a church context, is a cleric holding certain positions of authority within a religious hierarchy. The title is used mainly in the Anglican Communion and the Roman Catholic Church.-Anglican Communion:...

 of diocese of Dunkeld

Diocese of Dunkeld

The Diocese of Dunkeld was one of the 13 historical dioceses of Scotland preceding the abolition of Episcopacy in 1689.-History:It is thought that the diocese was constituted as far back as the middle of the ninth century. The first occupant was styled Bishop of Fortriu, the name by which the...

, but William Bell resigned all rights deriving from the election to the Pope, who did not seek to re-appoint him. According to Walter Bower

Walter Bower

Walter Bower , Scottish chronicler, was born about 1385 at Haddington, East Lothian.He was abbot of Inchcolm Abbey from 1418, was one of the commissioners for the collection of the ransom of James I, King of Scots, in 1423 and 1424, and in 1433 one of the embassy to Paris on the business of the...

 (vi. 45), William was appointed to the bishopric on 18 February 1342, a date confirmed by a known papal letter.

William's long rule as bishop was generally successful. However, it was during William's episcopate that St. Andrews' Cathedral was destroyed by fire

Fire

Fire is the rapid oxidation of a material in the chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition....

. In 1381, Pope Clement VII

Pope Clement VII

Clement VII , born Giulio di Giuliano de' Medici, was a cardinal from 1513 to 1523 and was Pope from 1523 to 1534.-Early life:...

 granted some benefices towards the cathedral's reconstruction, and promised certain rewards to those lay donors who assisted with this aim.

William died at St. Andrews, in the Priory

Priory

A priory is a house of men or women under religious vows that is headed by a prior or prioress. Priories may be houses of mendicant friars or religious sisters , or monasteries of monks or nuns .The Benedictines and their offshoots , the Premonstratensians, and the...

, on 23 September 1385. He was buried inside the cathedral, in the church's vestry.