| Canadian Clay Tobacco Pipe Industries: Dedicated to the 19th century Canadian clay tobacco pipe industry. |
| Clay Pipes.com: Devoted to the study and dissemination of information about clay tobacco pipes. |
| Clay Tobacco Pipes: Heather Coleman provides a history of English clay pipe making, and galleries of illustrations of a wide range of pipes categorised by style and period. |
| Knasterkopf: German society for clay pipe research: publishes an annual journal and holds annual conferences. |
| National Netherlands Pipe Collection: Pijpenkabinet Foundation's pipe museum displays over two-thousand items that encompass the culture of pipe smoking over 25 centuries and five continents. |
| Ottoman Empire Clay Pipes: Examples of Ottoman Empire period clay pipes found in Marseille quarantine harbour, supplies by Philip Gosse. Photographs of pipes and their maker's stamps. Text in French and English. |
| The Archaeology of the Clay Tobacco Pipe: An article by Craig Cessford from Assemblage, with references and bibliography. |
Classical
