Calendars provide summaries full enough, for most purposes, to replace the original documents. These summaries are printed in chronological order and do not necessarily reflect the archival ordering of the documents (hence ‘calendar’). They are the primary finding aid for the records that they describe. The Patent Rolls record 'letters patent', that is, open, public documents (in distinction to the 'letters close') issued by the Chancery in the name of monarch. The rolls contain public business, such as grants of lands or privileges, to individuals or to corporations. This series details records from the reign of Henry III (1216-72).