I found my great grandfather and great granduncle listed on what seem to be (from skimming autotranslations) missing landowner documents in the Czech Republic, dated as recently as the beginning of 2021 (web version linked below). Which was surprising to me, since they immigrated to the US around 1905, before the obvious 20th century upheavals. I guess unless property is valuable enough for someone (including the state) to invest effort in securing ownership of, it can sit with unclear ownership forever, more or less.
https://www.hlidamsikatastr.cz/Katastr/Neznami-vlastnici says unclaimed land will be forfeited to the state in 2023, I guess this must be highly specific to the Czech Republic. Still surprising to me that it'd take 100+ years!
https://www.hlidamsikatastr.cz/Katastr/Neznami-vlastnici says unclaimed land will be forfeited to the state in 2023, I guess this must be highly specific to the Czech Republic. Still surprising to me that it'd take 100+ years!