The Cathedral Builders: The Story of a Great Masonic Guild. E-book. Formato PDF Leader Scott   -  Forgotten Books, 2017  - 

This is very interesting in many ways. It proves that the architects who had been for some years in the service of the city and province of Florence, had been formerly established at Lucca, but from December 14, 1321, they were to be considered as permanently in the employ of the Florentines, and as such were permitted to provide a laborerium, etc.