| Montoulieu-Saint-Bernard | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Gaudens |
| Canton: | Cazères |
| Insee: | 31386 |
| Postal Code: | 31420 |
| Mayor: | Camille Sors[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Cœur et Coteaux du Comminges |
| Coordinates: | 43.235°N 0.9092°W |
| Elevation M: | 350 |
| Elevation Min M: | 276 |
| Elevation Max M: | 467 |
| Area Km2: | 4.83 |
Montoulieu-Saint-Bernard (in French pronounced as /mɔ̃tuljø sɛ̃ bɛʁnaʁ/; Occitan (post 1500);: Montoliu de Sent Bernat) is a commune in the Haute-Garonne department of southwestern France.
In 1957 the remains of a Gallo-Roman bath were discovered on a farm in the commune. The excavations carried out revealed a small, remarkably preserved thermal complex composed of a colonade vestibule, a swimming pool, and 3 more or less warm rooms (caldarium, tepidarium and frigidarium). Coins, fragments of amphorae and ceramics date its occupation in the 4th century AD. It is likely that this complex belonged to a villa in the large agricultural estate of the Roman villa of Chiragan.[2]