Pseudo-Isidore is the name historians gave to the unknown author of a collection of forged papal decretals from the first centuries. The collection, known as the Pseudo-Isidorian decretals was created in the first half of the 9th century in the cloister of Corbie in Carolingian Francia. The fraud was only discovered in the early 17th century, after the collection had already influenced medieval Canon Law and the development of the medieval Church. Scholars have since then tried to find out who the creators of the forgery were and what their intentions might have been.