| Historismus | the working group "Historismus" is an informel consortium of architects, archivists, historians and art historians |
| Kirchen und Kapellen | an architecture database for churches and chapels
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| theology | A broadly conceived, surprisingly varied website informs the interested reader about theological topics and explains these in a simple and easy-to-read way. Current topics are added regularly. Advice: Take your time for browsing! |
| Immanuel Kirche Dortmund Marten  |
| Johanneskirche Düsseldorf  |
| Evangelische Kirche Montevideo / Uruguay (ROH)  |