Mohyla wrote several books which were distributed in Ukraine, Belarus, Poland, Muscovy, Romania, and Georgia. One of his most important publications was the first Orthodox Catholic Catechesis worldwide (1640), written by him on the request of all Orthodox Catholic churches. After it was approved by several Ecumenical Patriarchs of Constantinople it became the foundational document for the Church doctrine in the orthodox world.[9][3]: 106 During the 17th and 18th centuries, this book had 25 editions.