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Encyclopedia Dubuque


"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN

Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.


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DIETRICH, John. (Prussia, May 27, 1827--May 10, 1921). Arriving in Dubuque in 1855, Dietrich worked as a plasterer and manufacturer of LIME for nineteen years.

In 1874 he began the annual manufacture of between 700,000 and 1,000,000 high quality bricks. Their superior quality made them popular among Dubuque builders.