in the trade of Bordeaux wine with England, as well as cereals and textiles. A major source of income was the production and export of pastel, a blue dye made from woad. Toulouse suffered several fires, but it was in 1463 that the Great Fire of Toulouse broke out, ravaging the city for fifteen days. After this dramatic event, King Louis XIII exempted the city from taxes for 100 years. The capitouls issued municipal decrees favouring the use of brick in buildings, rather than excessively flammable wood or cob. In the 16th century, and until 1562, the economy of Toulouse experienced a golden age: its Parliament made it the judicial capital of a large part of southern France, and the city became the first European centre for the trade in woad, the only blue dye then known in Europe which was very much in demand in the textile industry at the time. Its humanist milieu developed thanks to its university and parliament, which trained and attracted intellectual elites. The wealth generated by this culturally and economically dynamic environment is the source of the superb Renaissance mansions in Toulouse. In 1550 the population of the city made it the second or third largest city in France. It was estimated to have 50,000 inhabitants, a figure it would not regain until the 18th century. In 1562 the French Wars of Religion began and Toulouse became an ultra-Catholic stronghold in a predominantly Protestant region, the era of economic prosperity came to an end. The governor of Languedoc, Henri II de Montmorency, who had rebelled, was executed in 1632 in the Capitole in the presence of King Louis XIII and Cardinal Richelieu. In 1666 Pierre-Paul Riquet started the construction of the Canal du Midi which links Toulouse to the Mediterranean Sea, and is considered one of the greatest construction works of the 17th century. Completed in 1681, the canal stimulated the economy of Toulouse by promoting the export of cereals and the import of olive oil, wine and other goods from the Mediterranean regions. In the 18th century, Toulouse was a provincial capital that prided itself on its royal academies (the only city in France, along with Paris, to have three royal academies), but sometimes seemed far removed from the debates of ideas that agitated the Enlightenment. A famous example illustrates this backwardness of Toulouse mentalities of the time: in 1762 its powerful parliament