The database covers the 257 acting councillors who were in office for the period 1523–1680. The information has been collected from various sources: biographical registers and databases, biography collections, lineage databases, and research literature. It consists of data on births, deaths and marriages; dates of appointments; the age when appointed; spouses and their parents; information on family relations inside the Council; and the number of acting councillors per year. The database also shows how many council meetings person has attended between the years 1621 and 1654.