Image of <a href="//commons.wikimedia.org/wiki/Augustin_Keller" title="Augustin Keller">Augustin Keller</a> (1805 - 1883), Swiss politician from the Canton of Aargau, co-founder of the Old-Catholic Church <i>(Christkatholische Kirche)</i>
Unknown author<span style="display: none;">Unknown author</span>
19<sup>th</sup> century <div style="display: none;">date QS:P,+1850-00-00T00:00:00Z/7</div>
Ökumenische Kirchengeschichte der Schweiz, Freiburg im Üechtland / Basel 1994, page 226