St. Mary's Church, Bad Homburg

The Prussian government sought to incorporate the parishes into the Diocese of Limburg in order to prevent "foreign" influences.

The Prussian government made another attempt at integration, which the papal curia also agreed to and commissioned the Bishop of Trier Michael Felix Korum to implement it.

At the time, the Limburg bishop Peter Joseph Blum was in exile in Bohemia because he had come into conflict with the Prussian government due to the May Laws.

Karl Klein, who had been commissioned by Blum to lead the diocese, convinced Korum to use the Roman integration decree as a means of pressure against the government.

However, due to the Kulturkampf, construction could only begin 20 years later under the Mainz Cathedral builder, Ludwig Becker.