| Y/M/D | Description | Place |
|---|---|---|
| 1803/00/00 | The Cabildo is the site of the Louisiana Purchase transfer ceremonies. | The Cabildo, New Orleans |
| 1815/11/10 | Prospect K Robbins and Joseph C Brown establish a benchmark to survey the lands of the Louisiana Purchase. | Louisiana Purchase Survey Marker, Louisiana Purchase State Park |
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