Historical Marker Database

The Historical Marker Database (HMdb.org) is an online database that documents locations of numerous historical markers and commemorative plaques in the United States as well as other countries. The database was launched in 2006 by computer programmer J. J. Prats.

Source: Wikipedia — Historical Marker Database (CC BY-SA 4.0)

Historical Marker Database

The Historical Marker Database (HMdb.org) is an online database that documents locations of numerous historical markers and commemorative plaques in the United States as well as other countries. The database was launched in 2006 by computer programmer J. J. Prats.

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Source: Wikipedia "Historical Marker Database" · CC BY-SA 4.0

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