Ahoj, tag "construction_year" sa nepouziva, existuje ked tak "construction_date", ale myslim ze v tomto pripade bude uplne dostacujuci tag "year_of_construction", ktory je tu tiez pouzity.

https://wiki.openstreetmap.org/wiki/Key:year_of_construction
https://wiki.openstreetmap.org/wiki/Key:construction_date
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            Published using OSMCha: https://osmcha.org/changesets/165037904
            