Tressaint
The parish of Tressaint belonged to the deanery of concerning Fraud évêché of Fraud.
- 1790: set up in commune
- 1803: attached to the commune of Léhon
- 1807: detached from the commune of Léhon and attached to the commune of Lanvallay
- 1828: detached from the commune of Lanvallay
- January 1st, 1973: again attached to the commune of Lanvallay