When was the law that considers the Schwerin branch itself extict compiled?
around AD 500
Duchess Donata of Mecklenburg
Duchess Donata of Mecklenburg (born 11 March 1956) is the senior remaining member of the House of Mecklenburg-Schwerin.
 Since there are no males left in the family, the Schwerin branch itself is considered extinct due to the Salic law of succession, leaving Mecklenburg-Strelitz as the only remaining line of the House of Mecklenburg.
Salic law
Salic law ( or ; Latin: "Lex Salica" ), or Salian Law, was the ancient Salian Frankish civil law code compiled around AD 500 by the first Frankish King, Clovis.
 Recorded in Latin and in what Dutch linguists describe as one of the earliest known records of Old Dutch, perhaps second only to the Bergakker inscription, it remained the basis of Frankish law throughout the early Medieval period, and influenced future European legal systems.
 The best-known tenet of the old law is the principle of exclusion of women from inheritance of thrones, fiefs and other property.
 The Salic laws were arbitrated by a committee appointed and empowered by the King of the Franks.
 Dozens of manuscripts dating from the 6th to 8th centuries and three emendations as late as the 9th century have survived.
Regulatory law
Regulatory law refers law promulgated by an executive branch agency under a delegation from a legislature.
 Discussed at Regulation (law).
 Regulatory law contrasts to statutory law promulgated by the legislative branch, and common law or case law promulgated by the judicial branch. Ulrik of Denmark (1611–1633)
Prince Ulrik of Denmark, (2 February 1611 - 12 August 1633) was a son of King Christian IV of Denmark and his consort Queen Anne Catherine of Brandenburg.
 As the fourth-born son, he bore the merely titular rank of Duke of Holstein and Schleswig, Stormarn and Ditmarsh; however, he had no share in the royal-ducal condominial rule of Holstein and Schleswig, wielded by the heads of the houses of Oldenburg (royal) and its cadet branch Holstein-Gottorp (ducal).
 In 1624 Ulrik was appointed administrator of the Prince-Bishopric of Schwerin as Ulrich III.
 However, in 1628 Wallenstein's conquest of the prince-bishopric de facto deposed him.
 His father had to renounce all his family claims to prince-bishoprics in 1629.
 When in 1631 Swedish forces reconquered the prince-bishopric Ulrik failed to reascend as administrator. Helen of the Palatinate
Helen of the Palatinate (9 February 1493, Heidelberg – 4 August 1524, Schwerin) was a member of the Palatinate-Simmern branch of House of Wittelsbach and a Countess Palatine of Simmern by birth and by marriage Duchess of Mecklenburg.
 Stephan I, Count of Sponheim
Stephan I, Count of Sponheim (d. ca. 1080) is the patriarch of the Rhenish branch of the House of Sponheim, which ruled over the County of Sponheim.
 He was closely related to Siegfried I, Count of Sponheim, patriarch of the Carinthian Sponheimish branch, but the exact relationship between the two dynasts is disputed.
 Johannes Trithemius credits a Count Eberhard of Sponheim as founder of the Abbey of Sponheim and dates the founding to 1044, a position questioned by Johannes Mötsch.
 The "Genealogia Sponhemica" presents Count Eberhardus as son of Countess Hedwig and father of a single Count Stephanus I/II of Sponheim ().
 Donald C. Jackman considers Stephan I a son of Siegfried I. Both Jackman and Josef Heinzelmann consider Stephan as being identical to Stephan, Vogt of Worms documented with his brother Markward in 1068.
 Heinzelmann however casts doubt on a male lineage relationship of Stephan and Siegfried and sees Stephan I of Sponheim as being Lord of Sponheim but not a Count, notices that Stephan I of Sponheim is documented in 1075 as "S(igna) Stephani de Spanheim" with his seal in a document of Udo, Archbishop of Trier, and proposes Stephan to have married into the House of Sponheim.
 In another work Heinzelmann considers the Stephan mentioned in 1075 to be Stephan II, or maybe a single Stephan, mentions a Mainzer "ministerialis" Stephan, the son of Embricho (Emich) and nephew of Archbishop Ruthard, who lived later, as a possible relation, and puts forward that the documented Stephan and Markward belong to the House of the Counts of Metz/Lunéville, which later provided the Vogts of Worms: Vindiciae contra tyrannos
Vindiciae contra tyrannos (meaning: "Defences [of liberty] against tyrants") was an influential Huguenot tract published in Basel in 1579.
 The work proceeds through four questions concerning the response of the people to their king.
 The first two questions are treated briskly and concern whether a people are bound to obey and/or are able to resist their king when he breaks the divine law.
 The third and longest question considers whether the people can resist a king on the grounds that he is destroying the commonwealth.
 The answer to each of these questions is an affirmative and the work is interesting for the grounds that it gives for popular resistance.
 The work merges the theological view of covenant with the legal understanding of contract to show why resistance can be justified in the eyes of the law.
 However, it stops short of inviting any individual to judge a king.
 Rather, individuals could only take up arms if they are led by an inferior magistrate (so termed to distinguish them from the superior magistrate, i.e., the king).
 This shows considerable restraint in the wake of the St. Bartholomew's Day massacre and in comparison to other Reformed thinkers such as Christopher Goodman and John Knox.
 The fourth question considers whether foreign princes can legally support a popular rising against a king on the conditions set out in the first three questions. Albert V, Duke of Saxe-Lauenburg
Albert V of Saxe-Lauenburg (mid 1330s – 1370) was the second son of Duke Albert IV of Saxe-Lauenburg and Beata of Schwerin (*?
–before 1341*), daughter of Gunzelin VI, Count of Schwerin.
 Albert succeeded his elder brother John III in 1356 as Duke of Saxe-Bergedorf-Mölln, a branch duchy of Saxe-Lauenburg.
 He died without an heir and was succeeded by his younger brother Eric III. Divided government
A divided government is a type of government in which one party controls the executive branch while another party controls one or both houses of the legislative branch.
 The situation occurs in governance systems that follow the separation of powers model.
 Under said model, the state is divided into different branches.
 Each branch has separate and independent powers and areas of responsibility so that the powers of one branch are not in conflict with the powers associated with the others.
 The typical division creates an executive branch that executes and enforces the law as led by a head of state, typically a president; a legislative branch that enacts, amends, or repeals laws as led by a unicameral or bicameral legislature; and a judiciary branch that interprets and applies the law as led by a supreme court. Ulrik of Denmark (1578–1624)
Prince Ulrik John of Denmark, (Koldinghus Palace, Kolding, 30 December 1578 – 27 March 1624, Rühn) was a son of King Frederick II of Denmark and his consort, Sophie of Mecklenburg-Güstrow.
 As the second-born son he bore the merely titular rank of "Duke of Holstein and Schleswig, Stormarn and Ditmarsh" and had no share in the royal-ducal condominial rule of Holstein and Schleswig, wielded by the heads of the houses of Oldenburg (royal) and its cadet branch Holstein-Gottorp (ducal).
 Since 1602 he held the religiously defunct position of "Bishop of Schleswig", enjoying the revenues of the implied estates and manor.
 The year after he succeeded his grandfather as "Administrator of the Prince-Bishopric of Schwerin", holding both posts until his death.