Rieger Orgelbau  Rieger Orgelbau is an Austrian firm of organ builders, known generally as Rieger. The firm was founded by Franz Rieger. From 1873 it was known as Rieger & Söhne, and from 1879 as Gebrüder Rieger, after his sons took over. At the end of World War II, the firm was nationalised by the Czech government and merged with another workshop as Rieger-Kloss. The Rieger tradition was also continued by the owners and workers of the original firm, who moved to Austria and founded a new workshop as "Rieger Orgelbau". Franz Rieger was born in Zossen (Sosnová) in Austrian Silesia on 13 December 1812, and was the son of a gardener. He received a good education and decided to become an organ builder, to which end he travelled to Vienna, where he was apprenticed to organ-builder Joseph Seybert. His apprenticeship and time as a journeyman being completed, he returned home in 1844 as a master organ-builder. He married Rosalia Schmidt, with whom he had nine children, and completed his opus 1, a twenty-stop, two-manual and pedal organ, for the Burgberg Church, in 1845. He was accepted on the Trade and Industry Register of the Austrian Monarchy in 1852. He built organs in the classical tradition, and gained a high reputation. Through the work of his sons under his name, he was awarded the Golden Cross for Service in 1879 by Imperial decree. He died in Jägerndorf on 29 January 1886. Two of Franz Rieger's sons followed their father in his craft: Otto Rieger (3 March 1847 – 12 December 1903) and Gustav Rieger (1 August 1848 – 1905), served apprenticeships with their father. They then spent time as journeymen in Vienna, where they trained from 1864 with Franz Ullmann, another builder in the classical tradition. They also spent time in Bamberg and Würzburg, where they visited the workshop of noted Franconian innovator Balthasar Schlimbach. Upon their return home in 1873, their father passed his workshop to them, remaining in a consultative capacity until 1880; the name of the firm became "Franz Rieger & Söhne" and the opus count was restarted at zero.