Museums
| Name | Country | State | City | Updated by
  | Date |
|---|---|---|---|---|---|
| Commonwealth Club | USA | VA | Richmond | Anonymous | 07/29/2012 |
| Connecticut Historical Society | USA | CT | Hartford | Anonymous | 07/29/2012 |
| Coonley, Martha Kavanaugh Scott Walton | USA | PA | Philadelphia | Anonymous | 02/10/2012 |
| Cornell University, Herbert F. Johnson Museum of Art | USA | NY | Ithaca | Anonymous | 07/29/2012 |
| Craig and Tarlton, Inc | USA | NC | Raleigh | Anonymous | 02/10/2012 |
| Crocker Art Museum | USA | CA | Sacramento | Anonymous | 07/29/2012 |
| Crozat, George B. | USA | LA | Convent | Anonymous | 03/17/2012 |
| Crystal Bridges Museum of American Art | USA | AR | Bentonville | Anonymous | 07/29/2012 |
| Currier Museum of Art | USA | NH | Manchester | Anonymous | 07/29/2012 |
| D. Wigmore Fine Art | USA | NY | New York | Anonymous | 07/29/2012 |
