There the Cartesian innovations had found a patron in Adrian Heerebord, and were openly discussed in theses and lectures.
Luther nailed ninety-five theses on the church door on that day, the 1st of November 1517, when the crowd could see and read them.
The proceeding was strictly academic. The matter discussed, to judge by the writings of theologians, was somewhat obscure; and Luther offered his theses as an attempt to make it clearer.
There he published several tracts, as well as a translation of a learned theological work known as Theses Genevenses.
For the doctorate in the faculty of letters two theses must be submitted, of which the subject and plan must be approved by the faculty (until recently one of them was required to be written in Latin).