Starting around 1725, when a German organ builder Gottfried Silbermann that records of Freiberg adopted Cristofori's action, the next major development occurred in Germany. Perhaps the most important contribution was made by Johann Andreas Stein of Augsburg, who is credited with creating an enhanced escape that became the basis of the piano "Vienna" was praised by Wolfgang Amadeus Mozart and the German composer favored by most of the 19th and early 18th centuries-an-century. Twelve master from Germany migrated to central London around 1760 and founded the English school which, under John Broadwood and others, switched to piano production of building a strong, resembling those of our time. The French producer Sebastien Erard founded the French school in the 1790s, and in 1823 created a double action which is still in common usage.
At this time craftsmen in all Western countries working to perfect the pianoforte. Many improvements have been and are still being made in the design and construction. Germany and the United States has long been distinguished for the piano very well, especially those of companies founded by Karl Bechstein German and American companies Baldwin, Mason & Hamlin, Steinway, and Chickering. The pianos of Bösendorfer Austrian companies are also highly respected.
Compass of the piano early, only four, or at most, five octaves, but gradually increased to more than seven octave compass as the structural changes that are allowed to increase the tension of several tons.