The Central Historical Archive holds ecclesiastical books from 1819 to 1921. The books contain records of people born, deceased, and married at that time. Metric books are more or less complete. Some of them were compiled in the rural churches in the late 1819s, some books of concrete years were not transferred to the archive, etc. The program will allow users to determine exactly which district and which village metric books are stored in the Central Historical Archive and for which years.