The first mention of Mornas in historical records was in 818 although the town was occupied by the Romans well before that. Sadly nothing remains visible from this period.
In the middle ages the Counts of Toulouse captured the town and transformed its castle into a formidable looking fortress that you can still explore to this day.
The streets are lined with plane and sycamore trees, and you can see on some buildings the line where a huge flood from the Rhône valley once filled the town.
Four fountains can be found around the streets, which date back to around 1750 when new water pipes were built to supply the town's inhabitants. One of these was rebuilt in 1871 in honour of a local man who bequeathed 10,000 francs to the commune in his will. You can see it in the aptly name Place de la Fontaine.