Definition
Regiam Majestatem (Latin: "royal majesty," the opening words of the text) is the oldest extant legal treatise on Scottish law. It is a compilation of feudal legal rules, procedures, and customs organized into four books, and it functioned as an authoritative statement of the law of Scotland during the medieval period. The work closely parallels the English treatise attributed to Ranulf de Glanvill (Tractatus de Legibus et Consuetudinibus Regni Angliae), and large portions of the two texts are nearly identical, a fact that has driven significant historical debate about the direction of borrowing and the origins of each text.
Regiam Majestatem long held authority in Scottish courts as a foundational source of Scots common law, though its weight diminished as statutory law and institutional writers (Stair, Erskine, Bell) became the primary sources of Scottish legal authority.
Common Confusion
The treatise has been subject to two interlocking controversies that researchers must keep distinct.
First, authorship and date: The traditional attribution holds that Regiam Majestatem was compiled by order of David I, King of Scotland (r. 1124–1153). This attribution was repeated uncritically by many legal historians and appears in Black's and Rapalje & Lawrence without qualification. Lord Kames, however, demonstrated that the text cannot be older than the reign of David II (r. 1329–1371), pushing the composition date forward by roughly two centuries. Burrill acknowledges this challenge explicitly; the other dictionary sources do not.
Second, originality versus borrowing: Because Regiam Majestatem closely tracks Glanvill's English treatise, debate exists over whether the Scottish text was adapted from Glanvill, whether both drew from a common source, or whether the relationship reflects the shared feudal legal culture of the period rather than direct copying. This question bears directly on how Regiam Majestatem is used as evidence of distinctly Scottish legal custom.
Recognized Forms
/SUBTYPES
Regiam Majestatem is structured in four books covering, broadly: feudal tenure and land law; procedure and pleading; actions relating to property; and miscellaneous rules including matters of succession and status. Researchers citing specific provisions should identify the book and chapter rather than the work generally.
Why It Matters in Research
For researchers working in the Law Mind corpus, Regiam Majestatem is primarily significant as a reference point in three contexts:
Dating and authenticity problems. Any source that cites Regiam Majestatem as David I's work without qualification is relying on a pre-Kames attribution that later scholarship rejected. This includes Black's and Rapalje & Lawrence as they appear in the corpus. Burrill is the outlier that flags the Kames correction. Researchers should treat the David I attribution as a marker of older, unreliable secondary synthesis rather than settled history.
Glanvill parallels. Because Regiam Majestatem and Glanvill share extensive text, English and Scottish legal history sources in the corpus may reference the same underlying rules under different names. A researcher tracing a feudal procedural principle through Scottish sources must check whether the rule attributed to Regiam Majestatem also appears in Glanvill, and whether that parallel is noted or obscured in the source being read.
Authority in Scots law. Historical Scots legal materials — court records, pleadings, institutional writings — may cite Regiam Majestatem as binding or persuasive authority. Its weight in practice declined over time as the institutional writers displaced older compilations, but citations persisted well into the modern period for matters of feudal land law. Researchers encountering such citations should not assume the work carried the same status across all periods; the authority of the text was itself contested.
The title convention matters for searching. Sources in the corpus may refer to the work by its full Latin title, by the abbreviation Reg. Maj., or simply as "the ancient laws of Scotland." These references are not always linked in indexes.
Historical Dictionary Support
The four source dictionaries present a narrowing range of information. Black's (both editions) and Rapalje & Lawrence give nearly identical one-sentence entries attributing the work to David I and citing Matthew Hale's History of the Common Law. None of these entries engages with the authenticity debate or with the Glanvill relationship.
Burrill offers the most substantive entry. It correctly notes that the title derives from the work's opening words — the same naming convention that gives Glanvill its alternative designation Regiam potestatem — and it acknowledges Lord Kames's demonstration that the text postdates David I by at least two centuries. The truncated state of Burrill's entry as it appears in the corpus ("even b—") suggests the source text is incomplete, but what survives is more analytically useful than any of the other entries.
What all four sources miss: the textual relationship with Glanvill; the four-book structure; the process by which Regiam Majestatem was printed (first published by Sir John Skene in 1609); and the trajectory of its authority within Scots law relative to the later institutional writers. Researchers relying solely on these dictionary entries will have an incomplete and partially erroneous picture of the work's significance.
Jurisdictional Note
Regiam Majestatem is a source of Scots law only. It has no direct authority in English law, though the Glanvill parallel means that certain feudal rules appearing in both texts are sometimes invoked comparatively in English legal history scholarship. Researchers should not treat citations to Regiam Majestatem in English sources as evidence of Scottish legal borrowing without checking the direction of influence.