Where can you find all the councils of Church history in their original languages?  On this new page:

The Councils of Church History in Greek & Latin

To find not just some excerpts of the councils, but all their creeds, canons, acts and documents can be quite challenging, until now.

For ease of use, a section of resources putting an English translation next to the Greek and Latin is provided for the most important passages from the most important of these councils.

But if you want all 53 volumes plus of the councils in Latin (every Greek passage has a Latin translation) up through 1902, in a digestible format, you have found the mother lode.