Question: What nationality was the author of the book Horologium Oscillatorium?

full_context: Document 1: Christiaan Huygens: Christiaan Huygens, FRS ( or ; ] ) (Latin: "Hugenius" ) (14 April 1629 – 8 July 1695) was a prominent Dutch mathematician and scientist. He is known particularly as an astronomer, physicist, probabilist and horologist.
Document 2: James Gregory (mathematician): James Gregory FRS (November 1638 – October 1675) was a Scottish mathematician and astronomer. His surname is sometimes spelt as Gregorie, the original Scottish spelling. He described an early practical design for the reflecting telescope – the Gregorian telescope – and made advances in trigonometry, discovering infinite series representations for several trigonometric functions.
Document 3: Robert Hooke: Robert Hooke FRS ( ; 28 July [O.S. 18 July] 1635  – 3 March 1703) was an English natural philosopher, architect and polymath.
Document 4: Horologium Oscillatorium: Horologium Oscillatorium: sive de motu pendulorum ad horologia aptato demonstrationes geometricae (Latin for "The Pendulum Clock: or geometrical demonstrations concerning the motion of pendula as applied to clocks"), often abbreviated Horologium Oscillatorium, is a book published by Christiaan Huygens in 1673; it is his major work on pendulums and horology. This work is regarded as one of the three most important work done in mechanics in the 17th century, the other two being Galileo Galilei’s "Discourses and Mathematical Demonstrations Relating to Two New Sciences" (1638) and Isaac Newton’s "Philosophiæ Naturalis Principia Mathematica" (1687).
Document 5: The Man in the Moone: The Man in the Moone is a book by the English divine and Church of England bishop Francis Godwin (1562–1633), describing a "voyage of utopian discovery". Long considered to be one of his early works, it is now generally thought to have been written in the late 1620s. It was first published posthumously in 1638 under the pseudonym of Domingo Gonsales. The work is notable for its role in what was called the "new astronomy", the branch of astronomy influenced especially by Nicolaus Copernicus. Although Copernicus is the only astronomer mentioned by name, the book also draws on the theories of Johannes Kepler and William Gilbert. Godwin's astronomical theories were greatly influenced by Galileo Galilei's "Sidereus Nuncius" (1610), but unlike Galileo, Godwin proposes that the dark spots on the Moon are seas, one of many parallels with Kepler's "Somnium sive opus posthumum de astronomia lunari" of 1634.
Document 6: Conical pendulum: A conical pendulum consists of a weight (or bob) fixed on the end of a string or rod suspended from a pivot. Its construction is similar to an ordinary pendulum; however, instead of swinging back and forth, the bob of a conical pendulum moves at a constant speed in a circle with the string (or rod) tracing out a cone. The conical pendulum was first studied by the English scientist Robert Hooke around 1660 as a model for the orbital motion of planets. In 1673 Dutch scientist Christiaan Huygens calculated its period, using his new concept of centrifugal force in his book "Horologium Oscillatorium". Later it was used as the timekeeping element in a few mechanical clocks and other clockwork timing devices.
Document 7: Mysterium Cosmographicum: Mysterium Cosmographicum (lit. The Cosmographic Mystery, alternately translated "Cosmic Mystery", "The Secret of the World" or some variation) is an astronomy book by the German astronomer Johannes Kepler, published at Tübingen in 1596 and in a second edition in 1621. The full title being "Forerunner of the Cosmological Essays, Which Contains the Secret of the Universe; on the Marvelous Proportion of the Celestial Spheres, and on the True and Particular Causes of the Number, Magnitude, and Periodic Motions of the Heavens; Established by Means of the Five Regular Geometric Solids" (Latin: "Prodromus dissertationum cosmographicarum, continens mysterium cosmographicum, de admirabili proportione orbium coelestium, de que causis coelorum numeri, magnitudinis, motuumque periodicorum genuinis & proprijs, demonstratum, per quinque regularia corpora geometrica"). Kepler proposed that the distance relationships between the six planets known at that time could be understood in terms of the five Platonic solids, enclosed within a sphere that represented the orbit of Saturn.
Document 8: A Treatise of Human Nature: A Treatise of Human Nature (1738–40) is a book by Scottish philosopher David Hume, considered by many to be Hume's most important work and one of the most influential works in the history of philosophy. The "Treatise" is a classic statement of philosophical empiricism, skepticism, and naturalism. In the introduction Hume presents the idea of placing all science and philosophy on a novel foundation: namely, an empirical investigation into human nature. Impressed by Isaac Newton's achievements in the physical sciences, Hume sought to introduce the same experimental method of reasoning into the study of human psychology, with the aim of discovering the "extent and force of human understanding". Against the philosophical rationalists, Hume argues that passion rather than reason governs human behaviour. He introduces the famous problem of induction, arguing that inductive reasoning and our beliefs regarding cause and effect cannot be justified by reason; instead, our faith in induction and causation is the result of mental habit and custom. Hume defends a sentimentalist account of morality, arguing that ethics is based on sentiment and passion rather than reason, and famously declaring that "reason is, and ought only to be the slave to the passions". Hume also offers a skeptical theory of personal identity and a compatibilist account of free will.
Document 9: Galileo Galilei: Galileo Galilei (] ; 15 February 1564 – 8 January 1642) was an Italian polymath: astronomer, physicist, engineer, philosopher, and mathematician. He has been called the "father of observational astronomy", the "father of modern physics", the "father of the scientific method", and the "father of science". Galileo studied speed and velocity, gravity and free fall, the principle of relativity, inertia, projectile motion and also worked in applied science and technology, describing the properties of pendulums and "hydrostatic balances", inventing the thermoscope and various military compasses, and using the telescope (a Dutch optical instrument) for scientific observations of celestial objects.
Document 10: Astronomia nova: Astronomia nova (English: "New Astronomy", full title in original Latin: ) is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars. One of the most significant books in the history of astronomy, the "Astronomia nova" provided strong arguments for heliocentrism and contributed valuable insight into the movement of the planets. This included the first mention of the planets' elliptical paths and the change of their movement to the movement of free floating bodies as opposed to objects on rotating spheres. It is recognized as one of the most important works of the scientific revolution.
Document 11: New Essays on Human Understanding: New Essays on Human Understanding (French: "Nouveaux essais sur l'entendement humain" ) is a chapter-by-chapter rebuttal by Gottfried Leibniz of John Locke's major work, "An Essay Concerning Human Understanding". It is one of only two full-length works by Leibniz (the other being the "Theodicy"). It was finished in 1704 but Locke's death was the cause alleged by Leibniz to withhold its publication. The book appeared some sixty years later. Like many philosophical works of the time, it is written in dialogue form.
Document 12: Antonie van Leeuwenhoek: Antonie Philips van Leeuwenhoek ( , ] ; 24 October 1632 – 26 August 1723) was a Dutch businessman, scientist, and one of the notable representatives of the Golden Age of Dutch science and technology. A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and often considered to be the first acknowledged microscopist and microbiologist. Van Leeuwenhoek is best known for his pioneering work in the field of microscopy and for his contributions toward the establishment of microbiology as a scientific discipline.
Document 13: Nicolas Fatio de Duillier: Nicolas Fatio de Duillier {'1': ", '2': ", '3': ", '4': "} (also spelled Faccio or Facio; 16 February 1664 – 12 May 1753) was a Swiss-born mathematician, natural philosopher, and inventor. He spent much of his adult life in England and Holland. Fatio is known for his work on the zodiacal light problem in astronomy, for originating the "push" or "shadow" theory of gravitation, for his close association with both Christiaan Huygens and Isaac Newton, and for his role in the Newton v. Leibniz calculus controversy. He also invented and developed the first method for fabricating jewel bearings for mechanical watches and clocks.
Document 14: Method of Fluxions: Method of Fluxions is a book by Isaac Newton. The book was completed in 1671, and published in 1736. Fluxion is Newton's term for a derivative. He originally developed the method at Woolsthorpe Manor during the closing of Cambridge during the Great Plague of London from 1665 to 1667, but did not choose to make his findings known (similarly, his findings which eventually became the "Philosophiae Naturalis Principia Mathematica" were developed at this time and hidden from the world in Newton's notes for many years). Gottfried Leibniz developed his form of calculus independently around 1673, 7 years after Newton had developed the basis for differential calculus, as seen in surviving documents like “the method of fluxions and fluents..." from 1666. Leibniz however published his discovery of differential calculus in 1684, nine years before Newton formally published his fluxion notation form of calculus in part during 1693. The calculus notation in use today is mostly that of Leibniz, although Newton's dot notation for differentiation formula_1 for denoting derivatives with respect to time is still in current use throughout mechanics and circuit analysis.
Document 15: Giovanni de Galliano Pieroni: Giovanni de Galliano Pieroni (1586–1654) – military engineer specializing in erecting fortifications (authored "Trattato delle fortificazioni moderne"), architect, mathematician and astronomer who gained particular fame in his day as also as author of horoscopes. Just the same he was a practicing astronomer and a contemporary and a friend of Johannes Kepler (1571-1630) while both spent time in Prague. Earlier he became friendly with the astronomer, mathematician and physicist Galileo Galilei (1564-1642) – like Pieroni, Galileo also wrote on constructing fortifications, and the two shared interest in mathematics and astronomy.
ground_truth: Dutch