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Buchberger was ordained as a priest on 29 June 1900. In November 1923 Pope Pius XI promoted him to the rank of "Bishop" in the diocese Munich-Freising. On 24 January 1924 he was ordained as a bishop by Cardinal Faulhaber. From 12 March 1928 until his death, he was the Bishop of Regensburg.
He was an expert in church history and did work as an editor for several encyclopedic books on this subject, in which he also wrote articles himself. He was the editor of the Kirchliches Handlexikon (1904-1912), and between 1930 and 1938, he was the editor of the Lexikon für Theologie und Kirche, which in 10 volumes contained 8,000 articles.
In both publications, he showcases[clarification needed] "Christian" antisemitism.[1][2][3]
After the war, Buchberger was active in rebuilding the diocese. Immediately after the end of the war in 1945, 95 charitable institutions were founded by him.[citation needed]
In the following years, 175 new churches were built on his initiative. In 1950 on the occasion of the Christian Jubilee, Pope Pius XII made him an Archbishop.[citation needed]
Buchberger was an honorary member of a Catholic Corporation, Katholische Studentenverbindung Südmark (Akademischer Görresverein) in Munich, which is member of the Kartellverband katholischer deutscher Studentenvereine (KV).[citation needed]
