Question: What nationality was the author of the book Horologium Oscillatorium?
Sentence (from "Horologium Oscillatorium"): 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).
Relevant evidence: No