Breitkopf und Härtel (1719 - present) is a long-established German printer and publishing house based in Leipzig. Although publishing in a range of fields, the firm is particularly known for publishing music and is known as the world's oldest music publishing house. The firm was founded by Bernhard Christoph Breitkopf (1695 - 1777), who married the daughter of an old but struggling print shop owner. Bernhard rescued the business, giving it his name in the process, and passed it on to his son, Johann Gottlob Immanuel Breitkopf (1719 - 1794). After Johann's death, the business was taken over by Gottfried Christoph Härtel (1763 - 1827), who added his name to Breitkopf. The firm developed a niche in the music world, publishing scores by composers and the esteemed journal Allgemeine musikalische Zeitung. Among others, Breitkopf und Härtel published works by Beethoven, Haydn, Mendelssohn, Schumann, Chopin, Liszt, Wagner, and Brahms. For much of the 19th century, they also manufactured pianos which were highly regarded. Remarkably, the firm survived the upheavals of 20th century German history, relocating to Wiesbaden after World War II as Leipzig fell within East Germany. Even more remarkably, the company's archive mostly survived as well and is now considered a very valuable resource for the history of Western classical music.