It was not so long as it is known that Gaillac was occupied from the Gallo-Roman, but his name appears in documents referring to the founding of the Benedictine Abbey of Saint Michel in 819. Expresses its prosperity with the culture of the vine by the monks. The wine trade but also from woad (Isatis tinctoria) in the 16th century, carried on the river Tarn, will enable Gaillac thrive and develop at the same time a maritime activity. Cathar wars are far less responsible for power struggles as the religious wars between Catholics and Protestants.
Gaillac today is renowned for its vineyards, characterized by three soils (terraces, hills, plateau), a varietal background and a designation.
Finally Gaillac door like the rooster emblem that can be discovered on different facades of old houses or tents.