Knud Olsen
C.I. Starup
Axel Starup
July 1st, 1858, Knud Olsen etablished an organ building firm in Copenhagen. Born 1825 in Brumunddal, Norway, he was a carpenter by trade, and came to Denmark in order to learn organ building. Here he worked with the firm of Marcussen in Aabenraa and Gregersen in Copenhagen until starting his own company.
The first organ was delivered to the church in Ballerup September 26th, 1858; it cost 600 Rigsdaler, and had the following stops: Gedakt 8' Fugara 8' Principal 4' Quint 2 2/3' Oktav 2'.
Following an apprenticeship in carpentry, Carl Immanuel Starup, born 1862 in Copenhagen, was 1880 apprenticed to Knud Olsen. C.I. Starup continued his organ building education with Steinmeyer in Oettingen and with Cavaillé-Coll in Paris, and the worked changed it's name to I. Starup.

On January 1st, 1923 his son Axel immanuel Starup, born 1900 was taken into the firm, which thereafter went under the name I. Starup & Søn. Also A.I. Starup began as a carpenter; he gained further organ building experience with J.H. Jørgensen, Oslo and with Furtwängler & Hammer in Hannover.
Father and son continued their collaboration until C.I. Starup's death in 1944.
January 1st, 1973, Albert E. Lang, born 1936 in Weimar, Germany, became a partner of the firm. He had received his training with Gerhard Kirchner in Weimar, with Sauer in Frankfurt/Oder and finally with Friedrich Weigle in Stuttgart/Echterdingen. He passed the organ building examination in Germany in 1967, and in 1969 became a Danish Citizen.
As of January 1982, the firm has shifted to collective ownership until the firm was closed down in 1986.
Since 1986 organ builder Svend Erling Nielsen took ower the name
I. Starup & Søns Eftf.
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