Declaration and Address
| Declaration and Address, published December 1809 | |
| Location of the first publishing of the Declaration and Address in Washington, Pennsylvania | |
| Coordinates | 40°10′09″N 80°14′41″W / 40.16908°N 80.2448°W | 
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| PHMC dedicated | June 19, 1994 | 
The Declaration and Address was written by Thomas Campbell in 1809. It was first published in Washington, Pennsylvania, in 1809. It was the founding document for the Christian Association of Washington, a religious association that was a precursor to the Restoration Movement. In many ways, Thomas Campbell was before his time. He had an ecumenical spirit long before the ecumenical movement began. The Declaration and Address is a testimony to his appeal for Christian unity.