The country previously left the agency for two brief stints—once from 1984 to 2003 and again from 2017 to 2023. The newly announced decision will take effect by the end of 2026 ...

Trump administration announces exit, set to take effect December 2026, repeating 2018 withdrawal over policy conflicts ...

Philly qualified for its history (UNESCO having already given Independence Hall, one of many sites key to American history and independence in the City of Brotherly Love, a Heritage nod in 1979).