The oldest register entries for Horitschon appear in the books of the parish of Neckenmarkt in the period from 1653 to the re-establishment of the parish of Horitschon in 1696. From this year onwards, Horitschon has its own registers.
Unterpetersdorf belonged to the parish of Horitschon until the establishment of the independent local parish of Unterpetersdorf-Haschendorf on 1 January 1939.
Haschendorf was a branch parish of Horitschon from 1696 to 1789. During this time, the registers for Haschendorf can be found in the books of the Horitschon parish.
- 01 Ta 1789-1816
- 02 Ta 1816-1905
- 03 Ta Tr 1696-1709
- 04 Ta Tr St 1710-1732
- 05 Ta Tr-St 1731-1747
- 06 Ta Tr St 1748-1788
- 07 Tr 1789-1901
- 08 St 1789-1866
- 09 St 1867-1905