wichita.edu
… most studious man who, after attaining the doctorate in philosophy, which he received at Mainz under Father Francis Coster, also completed the course of scholastic theology there. Subsequently, while still unmarried and a secular cleric, due to his remarkable progress in theological studies and his skill in interpreting difficult matters, he became an…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/Autobiography/Kircher_autobiography.php