Question: This Republic, established in 1581 and the focus of The Secret Treaty of Dover, contained how many provinces?

Context paragraphs:
Treaty of the Three Black Eagles: The Treaty of the Three Black Eagles (because all three signatories used a black eagle as a state symbol, in contrast to the white eagle, a symbol of Poland) or the Treaty of Berlin (where it was signed by Prussia), was a secret treaty between the Austrian Empire, the Russian Empire and Prussia.  Signed between Russia and Austria on 13 September 1732 and joined by Prussia on 13 December that year, it concerned the joint policy of those three powers in regard to the succession of the Polish throne in light of the expected death of the Augustus II of Poland (of the Saxon House of Wettin) and the Polish custom of royal elections.  The three powers agreed that they would oppose another candidate from the House of Wettin, as well as the candidacy of the pro-French Pole Stanisław Leszczyński, father-in-law of Louis XV.  Instead, they chose to support either Infante Manuel, Count of Ourém, brother of the Portuguese king, or a member of the Piast family.

Treaty of Niš (1914): The Treaty of Serbian–Albanian Alliance, also known as the Treaty of Niš, was a secret treaty signed in Niš between Essad Pasha Toptani and prime minister Nikola Pašić of Kingdom of Serbia on September 17, 1914.

Eighty Years' War: The Eighty Years' War (Dutch: "Tachtigjarige Oorlog" ; Spanish: "Guerra de los Ochenta Años" ) or Dutch War of Independence (1568–1648) was a revolt of the Seventeen Provinces of what are today the Netherlands, Belgium, and Luxembourg, as well as the French region of Hauts-de-France against the political and religious hegemony of Philip II of Spain, the sovereign of the Habsburg Netherlands.  After the initial stages, Philip II deployed his armies and regained control over most of the rebelling provinces.  Under the leadership of the exiled William the Silent, the northern provinces continued their resistance.  They eventually were able to oust the Habsburg armies, and in 1581 they established the Republic of the Seven United Netherlands.  The war continued in other areas, although the heartland of the republic was no longer threatened; this included the beginnings of the Dutch Colonial Empire, which at the time were conceived as carrying overseas the war with Spain.  After a 12-year truce, hostilities broke out again around 1619, which can be said to coincide with the Thirty Years' War.  An end was reached in 1648 with the Peace of Münster (a treaty part of the Peace of Westphalia), when the Dutch Republic was recognised as an independent country (though the fact of its being such was evident long before).

Treaty of Jaworów: The Treaty of Jaworów was a secret treaty signed on 11 June 1675 between the Polish king John III Sobieski and France in Jaworów (today, Yavoriv).  In the treaty, Poland promised to aid France against Brandenburg-Prussia, in exchange for French monetary subsidies and support for Polish claims over Ducal Prussia.

Dutch Republic: The Dutch Republic, also known as the Republic of the Seven United Netherlands ("Republiek der Zeven Verenigde Nederlanden "), Republic of the United Netherlands, Republic of the Seven United Provinces ("Republiek der Zeven Verenigde Provinciën "), the United Provinces ("Verenigde Provinciën "), Seven Provinces ("Zeven Provinciën "), Federated Dutch Provinces ("Foederatae Belgii Provinciae "), or the Dutch Federation ("Belgica Foederata ") was a republic in Europe existing from 1581, when part of the Netherlands separated from Spanish rule, until 1795.  It preceded the Batavian Republic, the Kingdom of Holland, the United Kingdom of the Netherlands, and ultimately the modern Kingdom of the Netherlands.

Li–Lobanov Treaty: The Li–Lobanov Treaty or the Sino–Russian Secret Treaty ( Russian: Союзный договор между Российской империей и Китаем ) was a secret and unequal treaty signed on June 3, 1896 in Moscow by foreign minister Alexey Lobanov-Rostovsky on behalf of the Russian Empire and viceroy Li Hongzhang on behalf of Qing China.  The contents of the agreement were made public only in 1922.

Secret Treaty of Dover: The Treaty of Dover, also known as the Secret Treaty of Dover, was a treaty between England and France signed at Dover on 1 June 1670.  It required that Charles II of England would convert to the Roman Catholic Church and assist Louis XIV with 60 warships to help and 4000 soldiers in France's war of conquest against the Dutch Republic.  In exchange, Charles would secretly receive a yearly pension of £230,000, as well as an extra sum of money when Charles informed the English people of his conversion, and France would send 6,000 French troops if there was ever a rebellion against Charles in England.  The secret treaty was signed by Arlington, Arundell, Clifford and Bellings for England and Colbert de Croissy for France.  Both kings exchanged letters of ratification and kept secret the existence of the treaty, A public treaty of Dover was also negotiated, but it was a fake designed for propaganda and to hide the religious dimension of the secret treaty.  The Third Anglo-Dutch War was a direct consequence of this treaty.  The actual treaty was published by historians a century later.

Driver's licence in Canada: In Canada, driver's licences are issued by the government of the province or territory in which the driver is residing.  Thus, specific regulations relating to driver's licences vary province to province, though overall they are quite similar.  All provinces have provisions allowing non-residents to use licences issued by other provinces and territories, out-of-country licences, and International Driving Permits.  Many provinces also allow non-residents to use regular licences issued by other nations and countries.  Canadian driver's licences are also valid in many other countries due to various international agreements and treaties.

Treaty of Dovydiškės: The Treaty of Dovydiškės (Lithuanian: "Dovydiškių sutartis" ; German: "Vertrag von Daudisken" ), Daudiske, or Daudisken was a secret treaty signed on May 31, 1380 between Jogaila, the Grand Duke of Lithuania, and Winrich von Kniprode, the Grand Master of the Teutonic Knights.  The treaty was directed against Jogaila's uncle Kęstutis and its effect was to precipitate the Lithuanian Civil War (1381–1384).

Henrietta of England: Henrietta of England (16 June 1644 O.S. (26 June 1644 N.S.) – 30 June 1670) was the youngest daughter of King Charles I of England, Scotland and Ireland and his wife, Henrietta Maria of France.  Fleeing England with her governess at the age of three, she moved to the court of her first cousin Louis XIV of France, where she was known as "Minette".  After she married Philippe of France, brother of King Louis XIV, known as "Monsieur" at court, she became known as "Madame".  Her marriage was marked by frequent tensions.  Henrietta was instrumental in negotiating the Secret Treaty of Dover, in June 1670 – early in the same month as her unexpected death.  Jacobite claims to the throne of Great Britain following the death of Henry Benedict Stuart descend from her through her daughter Anne Marie, Queen of Sardinia.

Supporting paragraphs: Secret Treaty of Dover Dutch Republic
Answer: Seven