''Tractatus'' is Latin for " treatise". It may refer to: * ''

Tractatus de amore Andreas Capellanus was the twelfth century author of a treatise commonly titled ''De amore'' ("About Love"), also known as ''De arte honeste amandi'', for which a possible English translation is ''The Skill of Loving Virtuously''. His real identi ...

'' by Andreas Capellanus * ''

Tractatus Astrologico Magicus The ''Book of Soyga'', also titled ''Aldaraia'', is a 16th-century Latin treatise on magic, one copy of which was owned by the Elizabethan scholar John Dee. After Dee's death, the book was thought lost until 1994, when two manuscripts were locat ...

'', also known as the'' Aldaraia'' and the ''Book of Soyga'', a 16th-century Latin treatise on magic * ''

Tractatus coislinianus ''Tractatus coislinianus'' is an ancient Greek manuscript outlining a theory of comedy in the tradition of Aristotle's '' Poetics''. Dramatic theory The ''Tractatus'' states that comedy invokes laughter and pleasure, thus purging those emotions ...

'', an ancient manuscript on comedy in the tradition of Aristotle *''

Tractatus Eboracenses ''Tractatus'' is Latin for "treatise". It may refer to: * ''Tractatus de amore'' by Andreas Capellanus * ''Tractatus Astrologico Magicus'', also known as the'' Aldaraia'' and the ''Book of Soyga'', a 16th-century Latin treatise on magic * ''Tract ...

'' (Tractates of York), dealing with the relationship between kings and the Catholic Church, c. 1100 * Tractatus of Glanvill, the ''Tractatus de legibus et consuetudinibus regni Angliae'' (Treatise on the laws and customs of the Kingdom of England), the book of authority on English common law, written c. 1188 and attributed to Ranulf de Glanvill * '' Tractatus Logico-Philosophicus'', a philosophical work by Ludwig Wittgenstein * ''

Tractatus de Purgatorio Sancti Patricii ''Tractatus de Purgatorio Sancti Patricii'' (Treatise on Saint Patrick's Purgatory) is a Latin text written about 1180–1184 by a monk who identified himself as H. of Saltrey. The author is traditionally known as Henry, though this was an insertio ...

'' (Treatise on Saint Patrick's Purgatory), a Latin text of c. 1180–84 *''

Tractatus de Sphaera ''De sphaera mundi'' (Latin title meaning ''On the Sphere of the World'', sometimes rendered ''The Sphere of the Cosmos''; the Latin title is also given as ''Tractatus de sphaera'', ''Textus de sphaera'', or simply ''De sphaera'') is a medieval ...

'', or ''De sphaera mundi'', the basic elements of astronomy written by Johannes de Sacrobosco c. 1230 * '' Tractatus de superstitionibus'', a title shared by two medieval tractates on superstition

By Barauch Spinoza

* '' Tractatus de Intellectus Emendatione'' (On The Improvement Of The Understanding), an unfinished work by Baruch Spinoza * '' Tractatus Theologico-Politicus'', a philosophical work by Spinoza *'' Tractatus Politicus''

By Barauch Spinoza

See also