Dielmann, Leo M. J. (Leo Maria Joseph), 1881-1969

A native San Antonian, Leo Maria Joseph Dielmann was a product of the flourishing German-American community of south-central Texas. His father, John Charles Dielmann (1849-1923), was born in Hellenhahn, Germany, and immigrated to Texas in 1872. A stonemason, he became a partner in the San Antonio construction and building supplies business Pauly and Dielmann. He later formed his own company, J. C. Dielmann Co., and was involved in numerous building projects in San Antonio and across Texas. He was active in city affairs and in the German community. He was the first president of the Katholischer Staats-verband von Texas (the Catholic State League of Texas) and a participant in many other church and civic groups.

Leo M. J. Dielmann was born on 1881 August 14, the second of nine children of John C. Dielmann and Maria Gros Dielmann. Following his graduation from St. Mary's College in San Antonio in 1898, Leo M. J. Dielmann studied architecture and engineering in Germany. Returning to San Antonio, he worked as an architect and an officer in his father's business. In 1909 he was appointed City Building Inspector by Mayor Bryan Callaghan, serving for three years. From 1913-1914, he was an Alderman-at-large for the City of San Antonio.

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