The pontificate of Celestine V gave a new impulse to building development, as can be seen from the city statutes. In 1311, moreover, King Robert of Anjou granted privileges which had a decisive influence on the development of trade. These privileges protected all activities related to sheep-farming, exempting them from customs duties on imports and exports. This was the period in which merchants from Tuscany (Scale, Bonaccorsi) and Rieti purchased houses in the city. Hence the conditions for radical political renewal: in 1355 the trade guilds of leather-workers, metal-workers, merchants and learned men were brought into the government of the city, and these together with the Camerario and the Cinque constituted the new Camera Aquilana. Eleven years earlier, in 1344, the King had granted the city its own mint.