It's difficult to directly determine when larger organs began to be installed in Europe; however one of the first eyewitness accounts of organs is from Wulfstan of Winchester. This detailed account gives us an idea of what organs were like prior to the thirteenth century, when there are more records of large organs being placed in churches as well as their uses. In his account, he describes the sound of the organ: "among them bells outstanding in tone and size, and an organ through bronze pipes prepared according to the musical proportions." This is one of the earliest accounts of organs in Europe and also indicates that the organ was large and more permanent than other evidence would suggest.