During the Cultural revolution, many of the books were forcefully destroyed or burned to ashes, because they were considered by the Chinese communist party as among the Four Old Things to be eschewed. Therefore much valuable cultural history was destroyed forever. Fortunately in Taiwan many people still keep their genealogy books, some of which are even a few thousand years old.
Genealogy has been a fundamental part of Irish culture since prehistory. Of the many surviving manuscripts, a large number are devoted to genealogy, either for a single family, or many. It was practised in both Gaelic and Anglo-Norman Ireland. A number of the more notable books include: