Definition
Matrimonial causes. A collective term from English ecclesiastical and early civil law referring to the class of legal disputes arising from marriage and its dissolution. The term encompasses suits for divorce a mensa et thoro (judicial separation), nullity of marriage, jactitation of marriage, restitution of conjugal rights, and all other matters matrimonial.
The phrase is most closely associated with the Court for Divorce and Matrimonial Causes, established by the Matrimonial Causes Act 1857 (20 & 21 Vict. c. 85), which consolidated jurisdiction over these matters previously exercised by the English ecclesiastical courts. Before 1857, matrimonial causes were heard in the ecclesiastical courts under canon law. The 1857 Act transferred this jurisdiction to a new civil court composed of the Lord Chancellor, the judges of the Queen's Bench, Common Pleas, and Exchequer, and other designated judges.
The term is a label of art for the subject-matter jurisdiction of that court, not a description of a single cause of action.
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Common Confusion
TRIMONIAL CAUSES vs. MATRIMONIAL CAUSES: These terms are functionally synonymous in historical sources and refer to the same body of law. "Matrimonial causes" is the more durable and widely used form; "trimonial causes" appears primarily in older English legal writing and may reflect a variant spelling or typographical convention in certain editions of the dictionaries. Researchers encountering either form in historical texts should treat them as referring to the same subject matter. Do not confuse either term with "criminal conversation" (a common law tort then related to adultery), which was a separate proceeding.
TRIMONIAL CAUSES vs. DIVORCE A VINCULO MATRIMONII: The jurisdiction of the 1857 court over divorce a mensa et thoro (separation from bed and board, without dissolving the marriage) should be distinguished from absolute divorce a vinculo matrimonii (dissolution of the marriage bond). The 1857 Act expanded English civil courts' power to grant absolute divorce for the first time outside of private Act of Parliament, but the two types of relief remained conceptually distinct within the broader category of matrimonial causes.
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Why It Matters in Research
This term is essentially dead in modern legal usage. No American jurisdiction adopted it, and English law has long since reorganized its family courts such that neither the phrase nor the court it named survives. Researchers will encounter it almost exclusively in:
1. Pre-1875 English legal texts, treatises, and court reports, where it identifies the subject-matter jurisdiction transferred by the 1857 Act.
2. American treatises from the mid-to-late nineteenth century that surveyed English law for comparative or persuasive authority in domestic relations matters.
3. Historical dictionary entries (Bouvier, Burrill) that were written contemporaneously with the 1857 reform or shortly after.
A key research trap: the 1857 Act was a major structural break. Sources written before 1857 describing matrimonial causes will describe ecclesiastical court procedure, canon law doctrine, and a different remedial framework. Sources written after 1857 describe a new civil court with a largely codified jurisdiction. These are not interchangeable. When tracing the historical development of divorce law or nullity doctrine in English sources, the date of the source relative to the 1857 Act is critical.
American researchers should note that U.S. domestic relations law developed largely without reference to the 1857 English model, drawing instead on colonial-era statutes and state equity jurisdiction. The term "matrimonial causes" occasionally appears in older American equity treatises but carries no specific jurisdictional meaning in U.S. law.
The encyclopedia entries matched to this term (negligence causation, criminal causation, probable cause) are not relevant to matrimonial causes and reflect only a keyword match on "cause." Researchers should not follow those cross-references for this topic.
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Historical Dictionary Support
Bouvier and Burrill are in close agreement. Both identify the term as a descriptor for the subject-matter jurisdiction of the Court for Divorce and Matrimonial Causes created by the 1857 statute, and both enumerate the same core categories: divorce a mensa et thoro, nullity of marriage, jactitation of marriage, restitution of conjugal rights, and matters matrimonial generally. Burrill is more precise in citing the statute directly (20 & 21 Vict. c. 85, Aug. 28, 1857), which is useful for researchers tracing the legislative source.
Neither dictionary addresses the evolution of this jurisdiction after the Judicature Acts of 1873-1875, which absorbed the Court for Divorce and Matrimonial Causes into the new Supreme Court of Judicature. Researchers using these dictionaries as primary reference should supplement with later English sources for post-1875 practice.
Neither source discusses American reception of the term, which is consistent with its absence from American legal practice.
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Jurisdictional Note
This term is specific to English law and has no operative meaning in U.S. jurisdictions. In England and Wales, jurisdiction over matrimonial causes is now governed by the Senior Courts Act 1981 and the Family Law Act 1996, among other statutes, administered through the Family Court and Family Division of the High Court. The 1857 statutory framework that gave "trimonial causes" its meaning was superseded over a century ago.
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