The most important written accounts are those contained in administrative records. These accounts are more objective and accurate because the motivation for writing them was not to influence others. These records can be divided into two categories: surveys and serial documents. Surveys cover an estate or region on a particular date, rather like a modern inventory. Manorial surveys were very common throughout the Middle Ages, in particular in France and England, but faded as serfdom gave way to a money economy. Fiscal surveys came with the rise of the money economy, the most famous and earliest being the Domesday Book in 1086. The Book of Hearths from Italy in 1244 is another example. The largest fiscal survey was of France in 1328. As kings continued to look for new ways to raise money, these fiscal surveys increased in number and scope over time. Surveys have limitations, because they are only a snapshot in time; they do not show long-term trends, and they tend to exclude elements of society.