For the archdiocese and electorate of Cologne see Binterim and Mooren, Die Erzdiozese Koln bis zur franzosischen Staatsumweilzung, new ed.
The see, while for some purposes in the archdiocese of York, has its own convocation.
In 1852 there was held the first of a series of synods of the newly organized Roman Catholic archdiocese of Westminster.
Another, the Order of Our Lady of Lourdes, was founded in 1883 for work in the archdiocese of New Orleans.
It was in the archdiocese of Trondhjem in Norway.