| Name | Jefferson Pier Marker |
| Address | Jefferson Pier Marker, Washington, District of Columbia, United States |
| Date | 0000-00-00 |
| Time | 00:00:00 |
| Category | unknown |
| Description | A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.... |
| Coordinates | 38.88980, -77.03660 |
| Web address | /places/jefferson-pier-marker |