Year 1727 (MDCCXXVII) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar and a common year starting on Sunday of the 11-day slower Julian calendar.

Sir Isaac Newton PRS MP (25 December 1642 – 20 March 1727 [NS: 4 January 1643 – 31 March 1727]) was an English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian, who has been "considered by many to be the greatest and most influential scientist who ever lived." His monograph Philosophiæ Naturalis Principia Mathematica, published in 1687, lays the foundations for most of classical mechanics. In this work, Newton described universal gravitation and the three laws of motion, which dominated the scientific view of the physical universe for the next three centuries. Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws, by demonstrating the consistency between Kepler's laws of planetary motion and his theory of gravitation, thus removing the last doubts about heliocentrism and advancing the Scientific Revolution.

Johan Helmich Roman (26 October 1694 – 20 November 1758) was a Swedish Baroque composer. He has been called "the father of Swedish music" or "the Swedish Handel."

Roman was born in Stockholm into the family of Johan Roman, member of the Swedish royal chapel. The family name "Roman" may be derived from the Finnish place name Rauma, since Johan's ancestors lived in Finland. The boy probably received his first music lessons from his father. He joined the royal chapel in 1711 as violinist and oboist. Around 1715 the King granted Roman permission to study abroad, and the young composer spent some six years in London. He almost certainly studied under Johann Christoph Pepusch, met Francesco Geminiani, Giovanni Battista Bononcini, and, most importantly, George Frideric Handel, whose music made a lasting impression on Roman.

Roman returned to Sweden in 1721. He was soon appointed deputy master of the royal chapel, and six years later he became Chief Master of the Swedish Royal Orchestra. Roman's life during the 1720s was full of organisational activity which led to much improved standards at the chapel, and, in 1731, the first public concerts in Sweden. Roman's only work published during his lifetime, a collection of 12 sonatas for flute, violone and harpsichord, appeared in 1727. In 1730 Roman married, but his wife died just four years later. In 1734 the composer left Sweden to visit several European countries—Austria, England, France, Germany, and Italy. He returned to Stockholm in 1737, bringing back a wealth of music by various composers for the royal chapel to perform. In 1738 Roman married again. In 1740 he was elected a member of the newly established Royal Academy of Sciences.