Peter Helias ( la, Petrus Helias or '; – after 1166) was a medieval priest and philosopher. Born in

Poitiers Poitiers (, , , ; Poitevin: ''Poetàe'') is a city on the River Clain in west-central France. It is a commune and the capital of the Vienne department and the historical centre of Poitou. In 2017 it had a population of 88,291. Its agglome ...

, he became a pupil of

Thierry of Chartres Thierry of Chartres (''Theodoricus Chartrensis'') or Theodoric the Breton (''Theodericus Brito'') (died before 1155, probably 1150) was a twelfth-century philosopher working at Chartres and Paris, France. The cathedral school at Chartres promote ...

Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Si ...

in the 1130s, also teaching

grammar In linguistics, the grammar of a natural language is its set of structural constraints on speakers' or writers' composition of clauses, phrases, and words. The term can also refer to the study of such constraints, a field that includes doma ...

and

rhetoric Rhetoric () is the art of persuasion, which along with grammar and logic (or dialectic), is one of the three ancient arts of discourse. Rhetoric aims to study the techniques writers or speakers utilize to inform, persuade, or motivate par ...

in his school. Around 1155 he returned to Poitiers where he later died. Through Thierry, he is meant to have been influenced particularly by

Boethius Anicius Manlius Severinus Boethius, commonly known as Boethius (; Latin: ''Boetius''; 480 – 524 AD), was a Roman senator, consul, ''magister officiorum'', historian, and philosopher of the Early Middle Ages. He was a central figure in the t ...

; other influences include William of Conches. He contributed to the theory of substance and influenced

Roger Bacon Roger Bacon (; la, Rogerus or ', also '' Rogerus''; ), also known by the scholastic accolade ''Doctor Mirabilis'', was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through emp ...

's ''

Overview of Grammar The ' ( Latin for "Overview of Grammar"; . or ). was one of the earlier works on Latin grammar and Aristotelian logic by the medieval English philosopher Roger Bacon. It is primarily noteworthy for its exposition of a kind of universal grammar ...

''. In

linguistics Linguistics is the scientific study of human language. It is called a scientific study because it entails a comprehensive, systematic, objective, and precise analysis of all aspects of language, particularly its nature and structure. Ling ...

, he is regarded as having contributed ideas key to the development of grammatical categories such as

parts of speech In grammar, a part of speech or part-of-speech (abbreviated as POS or PoS, also known as word class or grammatical category) is a category of words (or, more generally, of lexical items) that have similar grammatical properties. Words that are as ...

Works

* A commentary on

Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, and academic skeptic, who tried to uphold optimate principles during the political crises that led to the esta ...

's ''

De inventione ''De Inventione'' is a handbook for orators that Cicero composed when he was still a young man. Quintilian tells us that Cicero considered the work rendered obsolete by his later writings. Originally four books in all, only two have survived into ...

'' * c. 1150: ''Summa super Priscianum'', an updated textbook on

Priscian Priscianus Caesariensis (), commonly known as Priscian ( or ), was a Latin grammarian and the author of the ''Institutes of Grammar'', which was the standard textbook for the study of Latin during the Middle Ages. It also provided the raw materia ...

's ''Institutiones grammaticae'', edited by Leo A. Reilly, Toronto 1993

References

{{DEFAULTSORT:Helias, Peter 12th-century French people 12th-century philosophers 1100s births 1160s deaths 12th-century linguists Scholastic philosophers 12th-century French writers 12th-century Latin writers