What has the author Georg Oskar Immanuel von Hase written?

You're likely thinking of Georg Oskar Emil von Hase (1850-1919), a German theologian and church historian. He is not known as "Georg Oskar Immanuel von Hase."

Here are some of his notable works:

* "Kirchengeschichte" (Church History): This is his most famous work, a comprehensive history of the Christian church published in multiple volumes.

* "Handbuch der Dogmengeschichte" (Handbook of Dogmatic History): A detailed treatise on the development of Christian doctrines.

* "Entstehung und Entwicklung der Lehre von der Dreieinigkeit" (The Origin and Development of the Doctrine of the Trinity): A study on the historical formation of the doctrine of the Trinity.

* "Die Verfassung der christlichen Kirche" (The Constitution of the Christian Church): A work on church governance and structure.

Georg Oskar Emil von Hase was a significant figure in German theological scholarship and his writings continue to be studied and debated today.