Sebastien Erard (originally Sebastian Ehrhardt) 1752-1831 was born in Strasbourg, where his family, of Swiss origin, became established c.1725. His family context obviously had a strong influence on his future career : his father and elder brother were both cabinet-makers, and other members of the Erard family were gilders or wood sculptors. As in the case of Broadwood, possessing wood-working knowledge  was a good start to building pianos.Lack of direct archive information means we have to rely on later sources to study Erard’s first steps in Paris. According to Pierre Erard (1794-1855), Sebastien’s nephew, « Sebastien and Jean-Baptiste Erard […] set up as instrument-makers in Paris in 1770-75. Very soon, the pianoforte became a serious rival to the harpsichord. The Erards were amongst the first to be interested in the new instrument, the harp only came later ».According to Fétis, who seems to hold his information directly from Erard himself, the young Sebastien arrived in Paris c.1768, and served an apprenticeship as a harpsichord maker. A few years later, he was ready to make his own instruments : a mechanical harpsichord, made for Mr de la Blancherie, established his reputation. The support of the Duchess of Villeroy was a major stepping stone in his early carreer : she provided him with a workshop in the Hotel de Villeroy, where he made her a square based on English models in 1777. Erard was obviously very good at getting protection in important places : in 1785 he gained the protection of Louis XVI against the guild of instrument-makers who were trying to stop him making pianos, and he supplied several instruments to Marie-Antoinette : a square piano, a combination piano, and a transposing piano.The earliest known instruments are a clavecin mécanique, dated 1779, with pedals allowing crescendo effects, and a square dated 1781, the year Erard established himself at n° 13 rue du Mail.The first grand pianos were probably built shortly before 1790 : the Erard archives mention five « pianos forme clavecin » in 1791. The earliest extant, dated 1791, is in the Paris museum of La Villette (another instrument in a private collection with an apocryphal label dated 1790 appears to be a few years later).According to Fétis, Jean-Baptiste Erard (1749-1826) came to help his brother while he was at the Hotel de Villeroy (Pierre says he was there from the very beginning), and the two brothers established the Société Erard in 1786.In 1792, if we follow Pierre Erard, Sebastien was in London to establish the English factory, at 18 Marlborough Street (it is possible that he went several times to England before this date). The London Erard factory seems to have specialized in harps : the earliest piano I know of is c.1830.Although some of the early instruments made by Erard already show every sign of inventive genius (mechanical harpsichord, combination piano, transposing piano), the run of the mill production prior to 1800 is more remarkable for it’s refinement and build quality than for it’s novelty of design.Erard’s genius really came to the fore during the thirty odd years he had left to live in the XIX th century, with a series of brilliant inventions that were to mark the history of piano and harp construction. He first of all concentrated on the harp, and created the double movement in 1810, after several years of research. This invention, to quote Pierre Erard’s words « gave undisputable proof of the mechanical genius of Sebastien Erard, as it is difficult to imagine anything more complex than the mechanism of the harp double movement ».According to Pierre, after successfully resolving this difficult problem, Sebastian moved on to that of the rapid repetition of notes on the grand piano action.Sebastian had actually been thinking about this problem since 1796 at least, as he wrote that year a description of a grand action with an intermediary check allowing the pilot to go back under the hammer butt without lifting the key right up. This research first came to fruition in 1809, date of the patent for the very ingenious « mécanique à étrier » that can be studied on several extant pianos (Paris and Brussels instrument museums).But this was only a first step towards the definitive solution, the utterly brilliant double escapement action, patented in 1821, still used today in a slightly modified form in modern concert grands.Another major patent was that of the metal agrafes, in 1808, that prevent the string from rising up with the blow of the hammer.